[3] Thomas' brother Martin Carter worked as a carriage-maker for the Clark Carriage Factory across the Canada–United States border in Toronto.
Iron castings were made by foundries in San Francisco, Newark, Vallejo, and Santa Cruz; but the company used only higher quality eastern wheels from Whitney or Taylor.
[3] Martin Carter supervised the Newark car shop while Thomas was the company business manager from offices in San Francisco.
Thomas died in 1898, and the company officially closed when Martin retired in 1902, but the Newark shop produced a few more parts until the 1906 San Francisco earthquake.
[5] The Society for the Preservation of Carter Railroad Resources operates a railroad museum in Ardenwood Historic Farm Regional Park, Fremont, California, including 1.25 miles (2.01 km) of 3 ft (914 mm) narrow gauge track and the society's collection of Carter Brother's rolling stock.