Green’s Dictionary of Slang

a prostitute [= SE whore].

[c.1707		‘Of King Edward and Jane Shore’ in Farmer Merry Songs and Ballads (1897) IV 100: Read old Stories, and there you shall find, / How Jane Shore, Jane Shore she pleas’d King Edward’s mind].
1840		R. Barham ‘The Black Mousquetaire’ in Ingoldsby Legends (1842) 2: While Louis Quatorze / Kept about him in scores, / What the Noblesse, in courtesy, term’d his ‘Jane Shores’.
1846		Swell’s Night Guide 62: ’Tis not of the ‘Fair Maid of Kent’ I indite / Nor yet a maid like ‘Jane Shore’.
1938		F.D. Sharpe Sharpe of the Flying Squad 331: jane shore: A whore.