What Marine Company did that turn into? I met the widow of a member who was assigned there.
Marine Engine 51, Zophar Mills, was first moved to Staten Island in 1908. At the time, the Engine number remained with the boat, regardless of it's location, thus Engine 51 moved from Harlem to SI. Later, newer boats were assigned to berths, which retained the Engine number. The 1908 move to SI was the last relocation for Engine 51 until 1959 when it was re-designated as Marine 9. During that time, 6 different boats served as Engine 51 in SI.
The 99th Street berth served Engines 43, 51, and 78. Engine 78 was re-designated Marine 5.