This quest is not available in game.
Find Cuergo's gold!
This map shows a stretch of beach with a southern face. Below the map are words, elegantly written...
South of Wheedle
South of home
Find a mast and flag and bones
Dig you there, if you be bold
Dig and claim Cuergo's gold!
A key you'll need and a key you'll see
The men you face take blood as fee.