i. evidence : patent amoigvity. The sole question presented by the record and arguments is whether the ambiguity or uncertainty of description in the contract of subscription, which . is made the foundation of the action, may, under •the rules of evidence, be made certain or explained by parol.
Ambiguities are of two kinds. They are defined as follows :
“The first (ambiguitas latens) occurs where the deed or instrument is sufficiently certain and free from ambiguity, but *431the ambiguity is produced by something extrinsic or some collateral matter out of the instrument; for example, if a man devise property to bis cousin, A. B., and he has two cousins of that name, in such case parol evidence will be received to explain the ambiguity.”
“The second or patent ambiguity occurs where a clause in a deed, will or other instrument is so defectively expressed that a court of law, which has to put a construction on the instrument, is unable to collect the intention of the party. In such ease evidence of the declaration of the party cannot be admitted to explain his intention, and the clause will be void for uncertainty.” 1 Bouvier’s Law Dictionary (5th Ed.), 97.
In the light of these definitions there is no difficulty in determining that the ambiguity in the instrument upon which this suit is brought is patent. It appears at once upon reading the subscription, and arises not so much from imperfection of description as from an absence of description. It is true the terms of the subscription may possibly suggest that the subscriber was to select twenty acres of land, but as this is not the construction claimed by the plaintiff, who sues for the value of a certain twenty acres, which he seeks to show by parol evidence was the twenty acres intended, we are confined to the inquiry whether the description of the land can be thus shown.
With reference to the admissibility of parol evidence m such cases Sugden makes use of the following language: “But although a latent ambiguity may be aided .by parol evidence, yet a patent ambiguity cannot be aided by extrinsic evidence, because that would be in effect to pass without deed what by the law can be passed by deed alone. Of this Bacon •observes infinite cases might be put, for it holdeth generally that all ambiguity of words by the matter within the deed, and not out of the deed, shall be helped by construction, or in some cases by election, but never by averment; but rather *432shall make the deed void for uncertainty.” 1 Sugden on Yendors, 175.
The same doctrine, quoting the same authority, is found in 1 Greenleaf on Evidence, § 297. The same principle applies in this case. If the description can be supplied by parol evidence, why cannot any other material part of the written instrument be supplied in the same way? And if this can be done then the whole instrument can be set aside, and parol evidence substituted therefor. It is true that descriptions are sometimes explained by parol, but only in the following cases: First, where the description is clear, but more than one subject or more than one person answers to-the description; second, where the description is true in part, but untrue as to the balance. Where the ambiguity, as in the case at bar, arises upon the face of the instrument, it can only be helped, if helped at all, by the rules of construction, and “construction is the act of discovering the thoughts which are expressed in words of writing, or it is the most probable explanation of what appears obscure and ambiguous.” 1 Bouvier’s Institutes, § 658.
If the contract is in a language not understood by the-court it must be interpreted; or if some of the words have various meanings or peculiar technical applications not known to the court, then the circumstances under which the instrument was made may be shown — not for the purpose of adding to or changing the instrument, but for the purpose of determining in what sense the parties intended to use the words, actually used. “In other words and more generally, if the court, placing itself in the situation in which the testator or contracting party stood at the time of executing the instrument, and with a full understanding óf the force and import, of the words, cannot ascertain his meaning and intention from the language of the instrument, then it is a case of incurable, hopeless uncertainty, and the instrument is, therefore, so far inoperative and void.” 1 Greenleaf on Evidence, § 300.
*433It is to be observed, also, that while the circumstances in which a party was placed and the situation of both parties may be shown the language of the parties is excluded. 1 Greenleaf on Evidence, § 297. “If the land granted be so inaccurately described as to render its identity wholly uncertain, it is admitted that the grant is void.” Boardman v. The Lessees of Reed, 6 Peters (U. S.), 328.
In view of a class of cases where courts have admitted parol evidence of extrinsic matters for the purpose of determining the intended sense of words of doubtful or equivocal -meaning, it has been questioned whether it is proper to say that a patent ambiguity is never susceptible of explanation by parol. The case of a written contract assigning a party’s interest in the freight of a ship is given as an example of this class; parol evidence of the circumstances of the transaction being admissible to ascertain whether the word “freight” referred to the goods on board, or an interest in the earnings of the ship. See 1 Phillipps on Evidence, 1858, note 988, by Cowen & Hill. As to whether such cases may or may not, under the above definition of the two classes of ambiguities, be fairly considered cases of latent ambiguity, it is unnecessary to determine, as the case at bar is not one of that character.
From the authorities we have been able to examine three rules may be taken to be correct: First. Where the instrument itself seems to be clear and certain on its face, and the ambiguity arises from some extrinsic or collateral matter, the ambiguity may be helped by parol evidence. Second. Where the ambiguity consists in the use of equivocal words designating the person or subject-matter, parol evidence of collateral or extrinsic matters may be introduced for the purpose of aiding the court in arriving at the meaning of the language used. Third. Where the ambiguity is such that a perusal of the instrument shows plainly that something more must be added before the reader can determine what of several things is *434meant, the rule is inflexible that parol evidence cannot be admitted to supply the deficiency. About this last-named class of cases there cannot, under the authorities, be any question. They belong to the ambiguitas patens of Lord Bacon.
In the case at bar the ambiguity is patent, and no interpretation or explanation of the words actually used could possibly help the ambiguity, or make the description complete or certain. Something must be added, before a description exists on the face of the instrument, and in the light of the foregoing discussion the omission cannot be supplied by parol evidence.
The ruling of the District Court on the demurrer must, therefore, be , .
Affirmed.