Silver Lining

Delvin requests that you travel to Markarth to find a man with great influence in the city. Travel to Markarth and enter the first shop on your left from the front gate. This man will give you the initial quest.

Silver lining
You must retrieve a Silver mold from a group of bandits in Pinewood shack just to the east of Falkreath. Once you enter the shack, go to the basement. There is a note on the table that will tell you there is a hidden room behind the bookshelf. To the right of this bookshelf and behind the table is a small red button on the wall. When pressed, the bookshelf will open with a loud bang. Follow the caves hallways, kill all bandits, and when you enter the last room you will see the Silver mold on a table, along with some ore, potions and gold.

Be careful for the last bit of this dungeon, there are a lot of traps. There is also a pressure plate in front of the table with the mold.

This is the longest quest out of all special jobs for the Thieves Guild.