Yngling's Ledger is a Thieves Guild quest given by Gentleman Jim Stacey. It is the second quest connected with the Bal Molagmer, a almost forgotten group of Thieves who stole from the unjust to give to the needy.
Background
Gentleman Jim Stacey of the Thieves Guild askes the Nerevarine to find proof of Yngling Half-Troll's corruption. In order to do so, they are to steal his ledger from inside his manor.
Quick walkthrough
Detailed walkthrough
Reward
No reward is given to the Nerevarine for the completion of this quest.