Not sure if the gardens were around in the 20th century or whether the North Eastern Railway built their loco shed on them in the 1800s:

HULL (BOTANIC GARDENS) NER Closed 14/06/1959. A brick built double roundhouse shed. Still standing, converted into a straight shed used for DMUs (Code BG) until 1987. Now in use as a fuelling point. Code HLB in 1948, 53B in 1950, 50C in 1960.