This refers to Rosherville Gardens, a lower class amusement park, described as follows by Brewer (54): “In Victorian times ‘the place to spend a happy day.’ These gardens were established by Mr. Rosher in disused chalk quarries at Gravesend. A theatre, zoological collections, and music formed part of their attraction, and the gardens were particularly favored by river excursionists.” Hardwick (149) contributes the titillation that the Gardens “were notorious for the number of prostitutes who used them to ply their trade.” Goodman (140) may be consulted for a definitive exposition on the gardens.

I sometimes go to Rosherville
Act II