Below is an excerpt from the “Annual Report of the State Engineer and Surveyor of the State of New York, and the Tabulations and Reductions from the Reports of the Railroad Corporations For The Year Ending Sept. 30, 1877” pertaining to the Buffalo and Jamestown Railroad.
It showed the road as being 66 1/2 miles long, owning five locomotives, nine 8-wheel first class passenger cars, two baggage, mail and express cars, and 115 freight cars, including coal cars, and 126 service cars. I am not sure what the last category includes, as most other railroads report having a handful of them.