delivered the opinion of the court.
When the deeds were respectively executed February 17, 1879, and July 24, 1889, for tract No. 1, the State was unuthorized to convey tidelands except on the seashore and coast. Elliott v. Stewart, 15 Or. 259 (14 Pac. 416). An act, however, subsequently empowered the State Land Board to sell “tide flats not adjacent to the shore and situate within the tidewaters of the Columbia River.” *12Laws Or. 1891, p. 189. A later act confirmed the titles to all tide fiats not adjacent to the shore in the waters of the State which had been sold to purchasers who in good faith had paid and the grantor had accepted the consideration for the premises. Laws Or. 1899, p. 57.
It is contended by defendants’ counsel that though the complaint stated and the testimony disclosed that the sands, which on February 17, 1879, formed the surface of tract No. 1, were constantly moving westward, no proof was offered tending to show that, when the act of 1891 became operative, any part of the original island was uncovered at the reflux tide within the boundaries specified in the deed of July 24, 1889, and there being no evidence of any shore line of such tract to which accretions could be formed, an error was committed in granting the relief awarded.
1. It may be taken for granted that, in disposing of all State lands, the State Land Board is the duly constituted agent of the State; but, as no power to sell tide flats in the Columbia River was conferred until the enactment of 1891, the deeds executed to plaintiffs’ predecessors in interest prior thereto were not within the scope of the agency, and probably no title to the premises was thereby conveyed. Salem Imp. Co. v. McCourt, 26 Or. 93 (41 Pac. 1105). When, however, the State, as principal, by the enactment of 1899 confirmed the execution of such deeds, the ratification related back to February 17, 1879, when the first conveyance of the premises was executed, thereby making the deed as effective from that moment as though it had been originally authorized. 1 Am. & Eng. Enc. Law (2 ed.) 1213; 31 Cyc. 1283. The doctrine of relation is a legal fiction devised to advance justice, but will not be invoked to defeat or impair intervening rights of third persons who are strangers to the transaction. 24 Am. & Eng. Enc. Law (2 ed.) 277; Johnson v. Jones, 1 Black, *13209 (17 L. Ed. 117). See, also, on this subject, Squire v. Princeton Lighting Co., 72 N. J. Eq. 883 (68 Atl. 176: 15 L. R. A. [N.S.] 657). The application of this principle cannot prejudice any intermediate equities of other persons, for neither W. E. Warren nor Lena F. Welch secured a conveyance of any part of the premises described in the deed executed to Hobson and Van Dusen.
2. At the trial there was received in evidence a map on which were delineated lines representing tract No. 1, as originally surveyed and as at present located, and also tracts numbered 2 and 3. The map is sketched on a uniform scale depicting the relative sizes of the several tracts and the respective distances from each other. The upper line of tract No. 1, as originally surveyed, has, in the 31 years immediately preceding 1910, moved westward about 3,000 feet, or an average progression of nearly 97 feet annually. From the time the first deed to tract No. 1 was executed to 1891, when tide flats in the Columbia Eiver were authorized to be sold 12 years had elapsed during which the average movement of the upper line of the sand had been 1,164 feet. It will be remembered that the first deed of this tract stated that the premises contained 21.37 acres. The confirmatory deed described the land by courses and distances, reciting that the real property specified embraced the same area so that the survey of the premises must have been made prior to the execution of the original deed. It will' be presumed, in the absence of any evidence to the contrary, that things have happened in the ordinary course of nature. Section 799, subd. 28, L. O. L. Since the average movement of the upper part of the sand island had been in 12 years 1,164 feet, the width of such tract, as originally surveyed, was greater than the number last stated, and hence there was some evidence tending to show that in 1891 a part of the island as at first surveyed remained intact to which *14accretions could have been formed, and hence no error was committed in the respect asserted.
3. The act, ratifying- the titles to all tide flats in the Columbia RiVer that had been sold, limited the confirmation to purchasers who had not secured from the State to exceed 320 acres of that class of land. Laws Or. 1899, p. 57. It is insisted that, since plaintiffs offered no evidence tending to show that Hobson and Van Dusen had not purchased tidelands in excess of the quantity specified, there was a failure of proof respecting the establishment of the title to their lands, and, that being the case, an error was committed in granting the relief prayed for In the complaint. The first deed to the tide flats having-been executed February 17, 1879, the application to purchase the premises undertaken to be conveyed was evidently predicated upon the statute then in force. That act authorized the State Land Board to sell tidelands owned by the State in such quantities as should be deemed most advantageous to the grantor, not exceeding 320 acres to any one person. Laws Or. 1878, p. 42, § 4. All ■applications to purchase such lands were required to be accompanied by an affidavit of the applicant to the effect, inter alia, that he had not directly or indirectly made any previous purchases of lands from the State, nor had any person for him, which together with the lands specified in the application exceeded 320 acres. Laws Or. 1878, p. 42, § 5. In order to have secured a greater quantity of tidelands than thus limited, Hobson and Van Dusen must have been guilty of perjury, and since it will be presumed that a person is innocent of crime, Section 799, subd. 1, L. O. L., the execution of the deed for the island made a prima facie case respecting the title which was perfected by confirmation, thereby imposing upon the defendants the burden of overturning such degree of proof, and no error was committed as alleged.
*15The trial court found that the premises included within the boundaries of the deed executed to Warren were accretions to the land referred to as tract No. 1; that such gradual accumulations of earth, sand, etc., designated as tract No. 2, were not uncovered at ordinary low water and exposed only at an extreme reflux of the tides; and that the conveyance .was void and no title vested in him by reason of the execution of the State’s deed. It is maintained that these findings of fact are not supported by evidence, and that the conclusion of law based thereon is erroneous. Plaintiffs’ counsel called 21 witnesses, most of whom had been engaged for many years in operating steam vessels plying between Astoria and other places on the Columbia River. These persons severally testified that at ordinary reflux, or what is generally called a zero tide, no part of the island embraced in the deed executed to Warren was ever uncovered. These sworn statements were disputed by four of defendants’ witnesses, each of whom testified that tract No. 2 was a separate island, and between it and tract No. 1, at low tide, was a shallow channel.
The trial court also found that, when Lena F. Welch obtained her deed to tract No. 3, the premises described were not tide lands, but wholly covered by water; and that the conveyance was void and she acquired no title thereby. The testimony as to this tract is nearly identical with that respecting tract No. 1, and the overwhelming weight of the sworn declarations fully support the findings of fact as made.
4, 5. Tracts numbered 2 and 3 being exposed only at unusually low water, the question to be considered is whether or not the court erred in determining that such parcels of real property were not tidelands. Mr. Justice Lord, in Andrus v. Knott, 12 Or. 501 (8 Pac. 763), makes the inquiry, “What is meant by the phrase ‘tideland’?” and answers the question by saying, “It must, then, be *16such land as is affected by the tide, that lies between ordinary high-water mark and low-water mark, and which is alternately covered and left dry by the ordinary flux and reflux of the tides.” In Elliott v. Stewart, 15 Or. 259 (14 Pac. 416), again defining such class of real property, an excerpt from the case of People v. Morrill, 26 Cal. 336, 353, is adopted, as follows: “The land usually overflowed by the neap or ordinary tides.” In Gerrish v. Proprietors of Union Wharf, 26 Me. 384 (46 Am. Dec. 568, 572), in construing an enactment which declared that the proprietors of land “shall have property to the low-water mark,” it was held that the line referred to evidently meant a mark which could be readily ascertained and established to which the tide at its ebb usually flowed; the court saying: “That place, to which the tide might ebb under an extraordinary combination of influences and of favoring winds, a few times during a generation, could not form such a known boundary.” In reaching that conclusion Mr. Justice Shepley of the Supreme Judicial Court of Maine criticises a decision of the Supreme Judicial Court of Massachusetts as follows:
“In the case of Sparhawk v. Bullard, 1 Metc. 95, low-water mark was considered to be that place, to which the tide ebbed, when from natural causes it ebbed the lowest. No authority is there cited, or reason stated for this difference of opinion.”
Referring to the determination reached by the Maine court, a noted author says:
“But the reason for limiting the king’s title to medium high tide does not apply to limit that of the subject to medium low tide. . The reason for extending the title of the riparian owner to low-water mark is to preserve his access to the water, and he must therefore have a right to go until, he reaches the water even at its lowest ebb.” 1 Farnham, Waters & Water Rights, Sec. 45c.
In the case at bar, as understood from the testimony and from the meaning of the word “zero” as applied to *17a state of the tide, the ordinary or average low-water mark was not accepted as the boundary of the grant of the flats, nor the most extreme reflux tide, but a medium line which presupposes the right of a purchaser of this class of real property at all times to have access to the water.
It appears from the testimony that there was established at Astoria on a permanent object a bench mark evidencing its elevation as compared with the sea level, and that there was also put up at that city a tide gauge on which was placed a zero mark as the supposed standard of low tide. Judicial notice will be taken of the coast and geodetic survey whereby the ebb and flow of the tide in harbors, bays, and navigable rivers on the Pacific Coast is observed at regular intervals, usually for a lunar month or more, and from the information thus obtained a “mean lower low water,” unaffected by strong prevailing winds or abnormal barometric conditions, is marked on a gauge as an assumed datum-level designated as zero, the point of which below the bench mark is carefully noted, so that in case of injury to or loss of the tide gauge the zero can be re-established from the bench mark. The depth of navigable water on all bars and shoals is accurately taken with reference to the zero mark, and, based on the knowledge thus secured, government charts for this region are prepared in aid of navigation. Tide tables are printed by the coast and geodetic survey office showing at various places the time and height of high and low water, to find the actual depth of which at any designated port and time there must be added to or subtracted from the soundings given on the chart the tabular heights noted in the tide tables. Tide Tables for the Year 1912, p. 161 et seq.
Tracts numbered 2 and 3 were not uncovered by the “mean lower low water,” but were sometimes exposed when the tide fell below the zero line; whether from wind blowing off shore or from a high barometer conducing to *18an extraordinary low water does not appear from the testimony. It is believed that the parcels of real property described in the deeds from the State to Warren and to Lena F. Welch were not tidelands within the meaning of that phrase, as heretofore determined by this court, but were parts of the bed of the stream which the legislature did not intend to convey. Johnson v. Knott, 13 Or. 308, 312.
6, 7. As the State Land Board was powerless to grant any part of the bottom of the Columbia River without express enactment, the deeds executed for such lands were void, and a decree tantamount to declaring such effect may be legally given in a collateral proceeding where adverse rights of strangers are necessarily involved. Anderson v. Roberts, 18 John. 515 (9 Am. Dec. 235, 239).
8. The owners of tract No. 1 are entitled to the accretion that logded on and thus formed a part of such tide flats. Taylor Sands Fishing Co. v. State Land Board, 56 Or. 157 (108 Pac. 126). The tideland island as originally granted has gradually moved westward, and no part of it is now exposed at low tide within the description given in the confirmatory deed. The title of Hobson and Van Dusen and of their successors in interest extended to all accretions made to such land, and, though the surface of the original island may have been washed away, the possession of the whole tract of such imperceptible deposits of earth, sand, and gravel follows the paper title. De Lassus v. Faherty, 164 Mo. 361 (64 S. W. 183: 58 L. R. A. 193, and notes). If it be conceded that plaintiffs’ right to the possession of the island, as it was described in the confirmatory deed, would revive in case the sands forming its surface should again be exposed at low tide, the assumed legal principle does not militate against them or defeat their title to the accretions. They and their predecessors in interest possessed the means whereby they .had just possession of each particle of sedi*19mentary deposit as it imperceptibly accumulated at the foot of the island, and this title was not lost because the head of tract No. 1 has gradually been washed away.
Believing that the trial court made correct findings of fact, and based thereon deduced proper conclusions of law, the decree is affirmed. Affirmed.