Again, to be clear, the coins are mixed together. You're not sure how much gold and silver there is, only that that there's a whole lot of copper, some less of silver, and some less of gold.
Rondo and Cugel grab a handful of gold and silver each.
Si'Nat leads the way back (or beckons Karnage to lead the way while he follows second?

) back out of the jail area to the intersection of the corridor going east where you first came from from. Seeing as how the only way left around is north, that's where you head (back in the rough cave-like area)...
About 20' north, the passage continues north but you see a small cave to the east. Your torchlight shows what appears to be unmoving figures in it.
(Sorry about the "straight lines" in the map in this area, the program I'm using doesn't allow for use of jagged lines)