Green’s Dictionary of Slang

turn n.1

[SE turn off, to kill]

a judicial hanging.

[UK]Shakespeare Measure for Measure IV ii: I do find that your hangman is a more penitent trade than your bawd, he doth often ask forgiveness [...] Truly, sir, for your kindness I owe you a good turn.
[UK]Jonson, Fletcher & Middleton Widdow I i: ’Tis true as turtle; A Goose quill and a Clerk, a Constable and a Lanthorn, Brings many a Baud from Coach to Cart, and many a Thief to one turn.
[UK]R. L’Estrange Supplement of Fables (1692) CCCCLXXXIV 455: You may fancy perhaps, that there are No other Thieves than those that the Law Exposes to the Pillory, or [...] a Turn perchance at Tyburn.
[UK]T. Betterton Match in Newgate V iv: I ne’re snivel’d [...] but e’ne resolv’d bravely to take a Turn at Tyburn with him.