The plaintiff, between 8.30 and 9 o’clock on a dark night in October, was riding a bicycle on Bussey Street in Dedham, down grade, toward East Dedham. As he came over the brow of a hill about six hundred feet away from Tracy Square he saw a car ahead of him, stopped in the Square. Tracy Square is formed by the junction of Bussey Street and Colburn Street, which run at right angles to each other. At this time he turned on to the defendant’s track which lies on the left hand side of Bussey Street going south, as he was going. He testified that he did this because it was better riding on the stone pavement between the rails than it was outside where the sewer had been recently constructed and the street was rough. *522He saw the car start. He then rode on, looking ahead, with his machine in control, going from six to eight miles an hour (he testified to six on cross-examination and to seven or eight on direct), and fell into an unguarded sewer trench four or five feet wide and running at right angles to the track, across the whole width of the track and further. How much further did not appear. There was no barrier or light across the track at that time. The trench was dug by contractors who were constructing a system of sewers under a contract with the town of Dedham.
The defendant asked the presiding judge to instruct the jury that it “ had a lawful right to operate its cars over the excavation on Bussey Street in which it is alleged the plaintiff fell, and to remove guards or barriers, if any, in the way of the passage of such cars. It was under no obligation to the plaintiff to replace such guards or barriers or the signals, if any, thereon ”; and that there was no evidence on which a verdict for the plaintiff could be found.
The plaintiff was allowed to go to the jury on the ground that the defendant’s servants took away a barrier or barriers put there by somebody else to protect the trench, and negligently failed to put them back.
Exceptions were taken to the refusal to give the rulings asked for, and to the ruling given. The plaintiff had a verdict.
1. The presiding judge was right in refusing to give the first of the two rulings asked for by the defendant. It is true that the defendant was not under the duty of guarding the sewer trench constructed by contractors for the town. Leary v. Boston Elevated Railway, 180 Mass. 203. Hyde v. Boston, 186 Mass. 115. Nor was it under the duty of removing and replacing barriers across its tracks to enable its cars to pass. Boston v. Coon, 175 Mass. 283, 284, 285. Prentiss v. Boston, 112 Mass. 43.
But it does not follow from this that the defendant would not be liable if its servants in charge of one of its cars, on coming to the trench and finding a barrier across its tracks and no one to remove it, removed the barrier and did not put it back, leaving the trench unguarded. In such a case the town or its contractors have not done the duty they owed to the railway company to remove and replace the barriers they put up, when *523necessary to enable the defendant’s cars to pass. For that reason the railway company had to do something which it ought not to have had to do. But if the railway company undertook to do what it ought not to have been forced to do, it is bound to exercise due care, and, if it does not, it is liable for injury caused by its negligence. Phinney v. Boston Elevated Railway, 201 Mass. 285. The situation is not unlike that of a landlord who is not bound to make repairs. He is not liable for not making them, but if he voluntarily undertakes to make them and makes them negligently he is liable. Gill v. Middleton, 105 Mass. 477. Galvin v. Beals, 187 Mass. 250, 252, 253.
2. It is at least doubtful whether the evidence warranted a finding that there was a barrier on the north of the trench before the car passed which the plaintiff saw when at the brow of the hill, six hundred feet away. But the evidence did warrant a finding that there was a barrier with a light on it within about ten feet of the trench on the south side of it before this car passed, and that it was removed by one of the defendant’s servants and not put back. The defendant has argued that the removal of a barrier south of the trench could not have caused the injury. On the uncontradicted evidence there were piles of dirt on both sides of the track and across the trench on each side of it. We are of opinion- that the jury were warranted in finding that a traveller in the exercise of due care would not have ridden between these piles of dirt when the exit was barred by a barrier running across it some ten feet away, on which a lantern was hung. If that be true, a finding was warranted that the accident was caused by the removal of the barrier on the south side of the trench.
3. We are of opinion that there was evidence that the plaintiff was in the exercise of due care.
The accident happened at night, and the jury were warranted in finding that it was a dark night. In this respect the case is like Torphy v. Fall River, 188 Mass. 310.
The defendant relies on MacFarlane v. Boston Elevated Railway, 194 Mass. 183. But in our opinion that case falls on the other side of the line. That was a case where the plaintiff was riding in the daytime and the whole situation was apparent to him. He rode between the rails of a track raised a foot above *524the surface of the street on each side of it, past harriers on one side and a red flag on the other, and where the other side of the street was left entirely open for travel. In the case at bar there were piles of dirt on each side of the track, occupying practically the whole of Bussey Street, and although he could have gone around them by going outside the side lines of Bussey Street through Colburn Street, yet his direct route lay along Bussey Street, and that part of Bussey Street on which the defendant’s tracks were laid apparently was open. He had seen it used within a few minutes by one of the defendant’s cars. It is true that if he had stopped to think he would have known that a car could pass over a hole when he could not. But whether he ought to have stopped to think and whether he ought to have thought of the possibility of there being a hole there was for the jury.
Exceptions overruled.