*3471 *346I. At the threshold is a question of the jurisdiction of the sheriff’s jury to assess the damage for the right of way, and, as the defendant justifies its possession because of such proceedings, the question is important. As a preliminary to the assessment of damage, because of a wrongful occupation by the defendant, the district court submitted to the jury *347a question of fact whether, before defendant asked the sheriff to summon a jury to assess the damage for the right of way, it attempted, in good faith, to agree with the plaintiff as to the amount of such damage, and said to the jury that, if it was not done and carried to such an extent as to satisfy the agents and officers of the company, as fair and reasonable men, that an agreement could not be arrived at, the award of the sheriff’s jury was absolutely void, and would not prevent a recovery in this case. Under the instructions of the court, the plaintiff’s right of recovery was made to depend on the fact of such a failure to agree. The jury must have found that there was such a failure established, as it assessed damages for wrongful occupation. Chapter '4 of title 10 of the Code, provides for “taking private property for works of internal improvement.” Section 1244 of the Code, is of that chapter, and is as follows:. “If the owner of any real estate, necessary to be taken for either of the purposes mentioned in the three preceding sections, refuse to grant the right of way, or other necessary interest in said real estate required for such purposes, or, if the owner and the corporation cannot agree upon the compensation to be paid for the same, the sheriff of the county in which the said real estate may be situated, shall, upon the application of either party, appoint six disinterested freeholders of said county, not interested in a like question, who shall inspect said real estate, and assess the damages which said owner will sustain by the appropriation of his land for the use of said corppration, and make report in writing to the sheriff of said county; and if said corporation shall, at any time before it enters upon said real estate for the purpose of constructing said railway, pay to said*sheriff for the use of said owner, the sum so assessed and returned to him as aforesaid, it may construct and maintain its railway *348over and across such premises.” it is provided in the next section that the freeholders so summoned shall be commissioners to assess the damages. The application to the sheriff must be in writing, and may be made by the landowner or the corporation, who must give to the other party five days’ notice in writing, of the time when the commississioners will view the premises.’ These reqirements were complied with in the assessment proceedings in this case. The application, in writing, to the sheriff, was made on the fourteenth day of October; and on the following day notice was served on the plaintiff that commissioners had been appointed, and of the time of viewing the premises, which was the twenty-first of October, 1892. In the application to the sheriff it was stated that plaintiff refused to grant the right of way, and also that the parties could not agree upon the compensation to be paid for it. When the commissioners appeared to view the premises, the plaintiff was there, and took part in the proceedings, and represented to the commissioners the value of his land. It is appellant’s claim that,, in view of these facts, it affirmatively appears that the commissioners had jurisdiction. We think that is true. The law makes no provision for the settlement of such a question before the commissioners act. If the parties are both present, and in contention, it is a strong circumstance showing that they do not agree. In Hartley v. Railway Co., 85 Iowa, 455 (52 N. W. Rep. 352), the proceedings for the assesement of damages was instituted by the owner of the land. The company presented the question that the sheriff’s jury had no jurisdiction to assess the damage, because it was not alleged in the application to the sheriff that the owner “refused to grant the right of way.” It is held that it was not necessary to* state that fact. . In that application it was made to appear that the owner and company could not agree on the compensation to *349be paid; and with the further allegations that the plaintiff owned the land, and the defendant had taken it, it is said in the opinion: “These statements and the demand for relief were all that were required to give the jury jurisdiction to act.” It will be noticed that the jury is allowed to take jurisdiction because of the statements in the'application. In this case it may further be said that the plaintiff appeared, and made' no question because of a failure to agree. The contention before the commission was merely as to the amount of damage to be allowed. Under such circumstances, we have no doubt as to the jurisdiction, as a matter of law. The conclusion is strengthened by the reasoning and conclusion in Railway Co. v. Rosseau, 8 Iowa, 373. We think the district court should have held, as a matter of law, that the commissioners had jurisdiction to act.
2 II. There are several grounds upon which the plaintiff claims that, if the court was in error as to the matter of jurisdiction, it was without prejudice. The grounds are — First, that defendant having already one right of way across the land, it was not entitled to another; second,, that the ground sought to be taken, is of greater width than one hundred feet; third, that defendant once before had a commission selected to assess the damage, and it had no right to a second one. The first and third of these grounds were pleaded in the reply, and must have been intended in avoidance of the condemnation proceedings pleaded by defendant. The district court declined to submit either of these matters to the jury, but expressly limited its inquiry to the jurisdictional fact, holding, in effect, that, if the jurisdictional fact existed, the occupancy of the land was legal, and the plaintiff could not recover. If the fact did not exist, the proceedings were void, and the occupancy was without authority. We assume, that the court treated *350these matters, in avoidance, as not available in a collateral proceeding, and in this, we think, the court was right. This proceeding is collateral, and if it be conceded, that either on appeal in the condemnation proceedings, or in a direct proceeding to set it aside, these matters would be available' (which we do not decide), it is clear, on authority, that they are not in this proceeding, after the jurisdiction of the commissioners appears. The general rule as to collateral attack, is not open to question. There may be doubtful questions as to the application of the rule. See, as to the general rule, Geyer v. Douglass, 85 Iowa, 93 (52 N. W. Rep. 111); Parker v. Albee, 86 Iowa, 46 (52 N. W. Rep. 533); Bacon v. Chase, 83 Iowa, 521 (50 N. W. Rep. 23); Lindsey v. Delano, 78 Iowa, 350 (43 N. W. Rep. 218); and Schee v. La Grange, 78 Iowa, 101 (42 N. W. Rep. 616). See, as more directly applicable to the particular facts, State v. Kinney, 39 Iowa, 226; Freeman, Judgm. (4th Ed.) section 524; Depot Co. v. Frederick (Mo. Sup.) 57 Am. & Eng. R. R. Cases, 656 (21 S. W. Rep. 1118, 1130); and Railway Co. v. Griesser (Kan. Sup.) (29 Pac. Rep. 1082). In Van Fleet, Coll. Attack, p. 29, the rule is stated as follows: “Jurisdiction existing, any order or judgment is conclusive in respect to its own validity in a dispute concerning any right or title derived through it, or anything done by virtue of its authority.” We hold, as a matter of law, that the commissioners had jurisdiction. The district court entered the judgment appealed from on the fact found by the jury, showing that they had not jurisdiction. That we hold to be an error. Now, if we permit the error to be avoided because of the facts pleaded in avoidance of the commissioners’ proceedings, and sustain the judgment, the effect is to render such facts available indirectly for what they would not be available directly. In other words, the error of the court would give the facts an effect they otherwise would not have. The situation is not like that in Bank v. *351Wright, 84 Iowa, 728 (48 N. W. Rep. 91 and 50 N. W. Rep. 23). There were no conditions on which plaintiff was entitled to judgment in the district court, with the facts of jurisdiction fixed.
This is conclusive of the case. Some questions argued are of no moment, because of the conclusiveness of the fact of j urisdiction with the preceding a collateral one. The judgment is reversed.