Green’s Dictionary of Slang

gold, thus money.

1839		H. Brandon Dict. of the Flash or Cant Lang. 165/1: Redge – gold.
1847		G.W.M. Reynolds Mysteries of London III 85/1: A Stranger—looked like a peterman. Busy-sack, redge-yack, six wedge-feeders, and togs in a busy-sack .
1859, 1860		Hotten Dict. of Modern Sl. etc.
c.1863		glossary in Occurence Book of York River Lockup in Seal (1999) 37: I starred the glaze and snammed 16 redge yacks. My joiner [? jomer] stalled.
1870		Hotten Sl. Dict.
1895		C. Crowe Aus. Sl. Dict. 66: Redge, gold.