Green’s Dictionary of Slang

(UK Und.) dice.

1842		Boston Satirist (MA) 21 Oct. n.p.: [E]ven when the hempen cravat was adjusted about his neck [...] he [...] pulled forth a set of props and invited the reverend divine to set him a quarter.
1859		Wkly Varieties (Boston, MA) 3 Sept. 7/2: We have shaken props with him in the tan-yard.