On 16 June 1837, at a little after six o'clock in the morning, a train of cars carrying lumber and gravel and crowded with twenty or more Irish track laborers and other workmen left the Boston depot of the Boston & Worcester Railroad Corporation bound for Worcester. About four miles out, just after the train had passed the City Mills and was nearing the Brookline road, a wheel on one of the cars broke. The train was thrown from the tracks. Two men were killed and several others severely injured.
Among the injured was a man named Gilham Barnes, engaged by the Corporation about two weeks before to carry out maintenance work on several bridges between Boston and Worcester. On the previous day, Barnes, his brother Luther, and one of the men who worked with them had ridden the same train (an unscheduled track maintenance train known to the corporation as the “gravel” train) as far as the Arsenal bridge, which carried the railroad over the Watertown road in Brighton, to deliver materials and tools. On the morning of the sixteenth, Barnes sent the others by wagon via the Mill Dam toll road to begin work on the Arsenal bridge while he made arrangements with the conductor of the gravel train for additional materials to be carried to the Worcester bridge. Barnes intended, it would seem, to ride the gravel train as far as the Arsenal bridge where he would jump off and join his workmen. “We saw the train going out just after we paid [the] toll,” Luther Barnes later recounted. “Then near City Mills we saw shingles &c all about. I saw my brother running towards us. He waved his hat twice. And he held up his arm and I saw blood and flesh.”