slang. Money.

1

1812.  J. H. Vaux, Flash Dict., Steven, money.

2

1812.  Sporting Mag., XL. 131/2. The steven, (meaning money in the language of a fighting ring), was soon forthcoming, which led to a combat not even anticipated.

3

1834.  H. Ainsworth, Rookwood, IV. ii. It plays the dickens with the steven.

4