Green’s Dictionary of Slang

a young Salvation Army woman.

1870		‘Comic Report of a Salvation Meeting’ in Ware (1909) 6: She sed thay wur Ally Luja’s lasses. ‘Ally Luja’s asses,’ I sed; ‘thay wants kikkin.’.
1884		Cheshire Obs. 5 Jan. 2/1: A pretty-looking Alleluia lass.
1891		Sporting Times 23 May 11/3: The salvation Army trio, with Mrs Howard (Cogia) as an ‘Alleluia Lass,’ was splendid.
1909		J. Ware Passing Eng. of the Victorian Era 6/2: Ally Luja lass (Lond. Street, 1886 on). Hallelujah lass was the name given to the girl contingent of the Salvation Army, when the movement rose into importance in London.