It is a twenty-dollar gold piece.

Now you cannot doubt my earnestness and fairness in this matter.

If you bring me the ring within forty-eight hours, I'll pay you, besides this twenty, the seventy-five dollars I offered in the first place." Snell eagerly clutched the piece of money.
"You're a brick!" he cried.

"And I'll lay myself out to get that ring.
I haven't begun to try the schemes I have in my head.

I will meet you here to-morrow night at about this time, and I'll do my best to have the ring.