From the September 16, 1887 issue of the Hornellsville Weekly Tribune:
Along the Susquehanna:
More fireman are being promoted to engineers this season than was ever known to be before during the summer months. Promotion usually comes in the winter, but this year has been an exception in his respect as promotions have occurred in nearly every month. Three more firemen were promoted to engineers this time, Sam Mercereau, W. McElwee and James Richardson.

From the July 24, 1891 issue of the Hornellsville Weekly Tribune:
The Corning Chronicle speaks thus of some of the actors in the Owego accident of Wednesday (July 22): The engineer of the colliding train, A.C. Eastman, lives in Hornellsville. His engine was 622. He had always been regarded as a watchful and careful man. He admits that he was asleep, and will undoubtedly be "given his time." His conductor, C. Dickey, lives in Cameron, and it is the opinion of railroad men that he and his crew will be laid off, as the train was running too fast for the general order to "look out for yard limits." The conductor of the train which was run into is O. Doane, and the engineer is Sam Mercereau, both of Hornellsville.

From the December, 1914 issue of Erie Magazine:
In the death of Engineer Samuel Mersereau, at Hornell, the Susquehanna Division suffered the loss of one of its most popular and efficient engineers. Mr. Mersereau had been an employee of the Erie Railroad for the past 34 years, 27 of which were in the capacity of locomotive engineer. For the past several years prior to his death, Mr. Mersereau was assigned to trains No. 1 and No. 6.