Mason City & Clear Lake Car 19 was built by Pullman as New York & Brooklyn Bridge 97. It was purchased in April, 1909 as a trailer. It was later motorized and converted to a freight motor. Car 19 was retired in the late 1930s, but it was not scrapped until 1963.
I could not find any information about Car 97 or others of its type on the New York & Brooklyn Railway. Could Car 97 have been a cable car trailer that operated on the Brooklyn Bridge?