20 Gold : In the area where the skeletons appeared when you picked up the 10 gold, on the right of the area, on your way back after you have been to the library.
In this area are 4 levers. 3 in a group, and 1 by itself. Stand in front of the 3 levers, and look to where the single one is. Now pull the 3 levers, one by one, from left to right. Then go back, and pull them again in the same order. If you get it right, a cage should be raised up from the floor in the area with the 1 lever, along with the 20 gold. But leave it all there for the moment, and go on with the stage. You can only get it on your way back.
voila c le passage ke je comprends pas g essayé de le traduire avec internet il fait n importe ki. et de ce ke g compris j arrive pas à avoir les pièces.
c pas lol ca ménerv... j aurai aps du faire allemand 1ere langue.