How do find drachma in mythology island?

To find the drachma on mythology island you need to go to the Grove of Temples, pass Apollo's temple, go down the mud elevators. Talk to the person down there and he will give you a drachma if you help him clean the graffiti on the walls. Click on each sentence of graffiti and use your mouse to scrub it clean. When you're done cleaning all of it talk to the person again and he will give you the drachma. DO NOT USE THE DRACHMA UNTIL YOU NEED TO BUY THE BAG OF WIND! That was my fatal mistake...