delivered the opinion of the court:
About one o’clock A. M. Sunday, September 29, 1918, Louis Lerette, appellee, approached the tracks of the Chicago, Burlington and Quincy Railroad Company at Creve Cceur street, in the city of LaSalle. There are four tracks at this point. The north track is a switch track, known as the “house track.” When appellee reached the crossing he found the house track blocked by a long string of freight cars. There were cars as far as he could see in each direction. He waited for a few minutes but the cars did not move. Then he sat down at the side of the street, made, lighted and smoked a cigarette, and then investigated to see if the string of cars was likely to be moved soon. He had waited for about twenty minutes, and during that time he had not seen or heard an engine and the cars had not moved. This crossing was not used much after midnight and frequently cars stood upon the crossing from midnight’ until morning. After satisfying himself that the string of cars was not going to move, appellee began to climb over the bumper between two of the cars. Just as he was getting onto the bumper the string of cars without warning was jerked suddenly, and appellee fell backwards and the wheel ran over his right leg, crushing it so that it had to be amputated. He brought his action against the director gen*351eral of railroads and the Chicago, Burlington and Quincy Railroad Company to recover damages for his injuries. Both defendants filed pleas of not guilty. The agent of the United States appeared and defended in the place of the director general, his plea reading: “And the defendant, John Barton Payne, director genéral of railroads, as agent under section 206 of the Transportation act, 1920, one of the defendants in the above cause, comes and defends,” etc. The cause was called for trial March 28, 1921, and thereafter a verdict for $18,000 was returned against both defendants, judgment was entered on the verdict and an appeal taken to the Appellate Court for the Second District February 27, 1922. While the cause was pending in the Appellate Court, James C. Davis, who succeeded Payne as agent of the United States, was substituted as sole defendant, and judgment was entered against him. A certificate of importance has been granted, and this appeal is prosecuted to review the judgment of the Appellate Court.
Counsel for appellant have argued at great length that the accident did not occur at the public crossing; that the string of cars did not block the crossing longer than five or six minutes; that the automatic bell on the engine was ringing during the entire time the cars were on the crossing; that the testimony of appellee is not worthy of belief; that the great preponderance of the evidence directly contradicts the testimony of appellee; that the verdict of the jury is against the preponderance of the evidence; and that the damages awarded are the resúlt of passion and prejudice, are not supported by the evidence and are excessive. Whatever view we might entertain of these questions if it were our province to review them, it is sufficient to say that they are all questions of fact and that the finding of the Appellate Court on questions of fact is conclusive. The only question we are permitted to consider is whether there is any evidence which fairly and reasonably tends to prove the allegations of the declaration. Primarily it is a question *352for the trial court whether the evidence, with all the legitimate and natural inferences to be drawn therefrom, is sufficient, if credited, to sustain a verdict. The question of the weight to be given the testimony of witnesses is a question for the jury. The action of the jury and the trial court on controverted questions of fact is open for review in the Appellate Court. Whatever finding of fact is made by the Appellate Court is conclusive if there is any evidence in the record fairly tending to support that finding.
Appellant contends that appellee in his attempt to pass between the cars by climbing over the bumper was violating section 17 of the act relating to the operation of railroads and was guilty of contributory negligence, and that this contributory negligence was the proximate cause of the injury. The facts as found by the circuit court and the Appellate Court established that those operating the train violated section 14 of the same act by obstructing Creve Cceur street, a public highway, by leaving the cars across the street more than ten minutes, and section 7 by starting the train within the city of LaSalle without ringing a bell or sounding a whistle a reasonable time before starting. Violation of a law at the time of an accident by one connected with it is usually evidence of negligence, but there remains a question of fact whether the illegal act is the proximate cause of the injury. The mere fact that plaintiff was violating a law at the time he was injured ought not to bar his right to recover any more than the fact that defendant was violating a law at the time plaintiff was injured ought to conclusively establish plaintiff’s right to recover. Where the defense is that plaintiff’s unlawful conduct at the time of the accident was the proximate cause of the accident, the difficult. question presented for determination is whether the unlawful conduct was a direct and proximate cause contributing, with others, to the injury or whether it was a mere condition of it. The mere fact that plaintiff was violating the law at the time he was injured will not bar his *353right to recover unless the unlawful act in some way proximately contributed to the accident in which he was injured. (Star Brewery Co. v. Hauck, 222 Ill. 348; Graham v. Hagmann, 270 id. 252; Ensley Mercantile Co. v. Otwell, 142 Ala. 575, 4 Ann. Cas. 512; Munroe v. Hartford Street Railway Co. 76 Conn. 201, 56 Atl. 498.) In determining whether the unlawful conduct of plaintiff will bar his right to recover there must be kept in mind the distinction between that which directly and proximately produces or helps to produce the result as an efficient cause and that which is a necessary condition or attendant circumstance of it. If the illegal act is a mere condition which made it possible for the accident to occur but is in itself no part of the accident it will not bar recovery. It is, of course, an essential condition of most accidents that the injured party be where he was at the time he was in order for the injury to occur, and the fact that he would not have been there if he had not been violating the law is not, in itself, a defense. (Newcomb v. Boston Protective Department, 146 Mass. 596, 16 N. E. 555; Berry v. Sugar Notch Borough, 191 Pa. St. 345, 43 Atl. 240; Tackett v. Taylor County, 123 la. 149, 98 N. W. 730.) Granting, but not deciding, that appellee’s act in climbing through the string of cars, under the circumstances, was an illegal act, it is still a question of fact whether this illegal act was the proximate cause of the injury. (Lake Erie and Western Railroad Co. v. Mackey, 53 Ohio St. 370, 41 N. E. 980; Illinois Central Railroad Co. v. Panebiango, 227 Ill. 170; Rosenthal v. Chicago and Alton Railroad Co. 255 id. 552.) It is clear that appellee would not have been injured as he was injured if the cars had not been moved at the time and in the manner they were moved. It is therefore a controverted question of fact whether the act of appellee in climbing through the cars was the proximate cause of the injury received, and that question has been settled in appellee’s favor by the judgment of the Appellate Court. It is only where the facts are admitted *354and all reasonable minds agree that the injury was the result of plaintiff’s own negligence that this court may, as a matter of law, find that there was such contributory negligence on the part of plaintiff as to defeat a recovery. (Dukeman v. Cleveland, Cincinnati, Chicago and St. Louis Railway Co. 237 Ill. 104; Austin v. Public Service Co. 299 id. 112.) On the record before us, the question whether appellee observed that degree of care and caution imposed upon him by law was one of fact, and the determination of the question involved the weighing and consideration of evidence, and this court is therefore without authority to disturb the judgment of the Appellate Court on that question.
It is contended that the court erred in giving certain instructions at the request of appellee which referred the jury to the declaration to determine the issues. This form of instruction has been repeatedly condemned by this court. (Krieger v. Aurora, Elgin and Chicago Railroad Co. 242 Ill. 544; Laughlin v. Hopkinson, 292 id. 80.) But appellant is in no position to urge the question in this case, for the reason that the same error is found in many instructions given at the request of the defendants below. McInturff v. Insurance Co. of North America, 248 Ill. 92; Fleming v. Elgin, Joliet and Eastern Railway Co. 275 id. 486.
It is also contended that the court erred in refusing to give defendants’ instruction No. 21, which set out in full the section of the statute forbidding a railroad corporation to obstruct a public highway for more than ten minutes, and which told- the jury that an ordinance of the city of LaSalle set forth in the fdurth count of the declaration was void because it conflicted with this statute. The circuit court held the ordinance void and refused to admit it in evidence, and so there was no reason for giving this instruction. Furthermore, there was evidence to show that defendants had violated the statute, and it was immaterial whether or not they had violated the ordinance which covered the same subject. It is argued that the jury were referred to the *355declaration by certain instructions, and that this ordinance was in one count of the declaration and that the jury’s verdict may have been based on this void ordinance. There is nothing in the record to show that the jury ever saw the declaration or knew that the ordinance was set forth in its fourth count. The court should not permit the pleadings in civil actions to be taken by the jury when they retire to consider their verdict and we must assume that the court did its duty in this regard and did not deliver the declaration to the jury. Bernier v. Illinois Central Railroad Co. 296 Ill. 464.
At the time the cause was orally argued in the Appellate Court appellee filed his written motion asking that the court substitute James C. Davis, agent of the United States, as sole defendant in place of the director general of railroads and the Chicago, Burlington and Quincy Railroad Company, and that the judgment of the circuit court be modified so that it would stand against James C. Davis, agent of the United States, alone. That motion was allowed. Appellant now contends that it was error to sue the original defendants jointly; that the railroad was being operated by the director general and that he alone was liable for any damages growing out of such operation, and that the judgment, being a joint judgment, must stand against both defendants or fail as to bo.th. The only parties before this court are appellee, Louis Lerette, and appellant, James C. Davis, agent of the United States. The agent of the United States is the successor in office of the director general of railroads, and it was proper to substitute the agent for the director general. The same counsel appeared for both defendants in the circuit court, and no question was ever raised by the director general, the predecessor in office of appellant, that, there was a misjoinder of parties defendant. No motion was made to dismiss as to the railroad company, no separate motion was made to find the issues for the railroad company, no point was raised in the written motion for new trial that the railroad was not a proper party, and no assign*356ment of error was made in the Appellate Court raising this question. Appellants in the Appellate Court could waive the question of misjoinder, and it is clear that they did waive it. (Eckels v. Muttschall, 230 Ill. 462.) It is well established that where a party files a written motion for a new trial he will be held to waive all causes therefor not set forth in his written motion. (Erikson v. Ward, 266 Ill. 259.) If the question had been raised in the circuit court appellee could have taken judgment against the agent, the successor of the director general, alone, notwithstanding the declaration charged joint negligence and there was a verdict finding joint liability. (Illinois Central Railroad Co. v. Foulks, 191 Ill. 57; Postal Telegraph-Cable Co. v. Likes, 225 id. 249.) There is really but one interest represented by the defendants. When John Barton Payne, agent of the United States, appeared and defended for and in the place of John Barton Payne, director general of railroads, the substitution required by section 206d of the Transportation act was effected for all practical purposes. The judgment we are called upon to review is a judgment against the agent alone. The railroad company is not here complaining. The judgment was properly entered against the agent and he has no cause for complaint. The legal effect of the motion in the Appellate Court was to abandon the verdict in the trial court in so far as it affected the railroad company and to take a judgment against the agent of the United States, the successor in office of the director general of railroads. No substantial rights have been invaded by granting the motion, and the action of the Appellate Court in that regard will not be disturbed.
The judgment of the Appellate Court is affirmed.
Judgment affirmed.