Green’s Dictionary of Slang

love lane n.

the vagina.

1896		Farmer Vocabula Amatoria (1966) 234: Retour de matines. To copulate; ‘to have an ejectment in Love Lane’.
1980		Maledicta IV:2 (Winter) 183: Examples here include [...] Love Lane.

In phrases

take a turn in Love Lane on Mount Pleasant (v.)

to have sexual intercourse.

1890–1904		Farmer & Henley Sl. and Its Analogues.
1896		Farmer Vocabula Amatoria (1966) 41: Bonheur, m. The act of kind; ‘a turn on Mount Pleasant’.