Whittington priory, n. — Green’s Dictionary of Slang

Whittington priory n.

[its association with Dick Whittington (c.1358–1423), who ‘turned again’ at nearby Highgate]

Holloway Prison.

1885		Edinburgh Eve. News 2 Nov. 2/7: A good deal of sympathy has always been felt for Mr Edmond Yates on account of his sojourn in ‘Whittington Priory’.
1892		Fact, Fancy, and Fable 528/1: Whittington’s Priory. Holloway Prison, London.
1909		J. Ware Passing Eng. of the Victorian Era.