Employer: Basso [Stonemarket - Basso's Office]
Availability: You receive the opportunity to start this mission, after you have completed the game's second chapter. You need to meet up with z Basso w in the Crippled Burrick tavern.
Your destination has been shown in the above screenshot - it is located in the [Stonemarket - Baron's Way South] district, which you can reach, among others, by crossing the Southern part of the City center. Before you go there, make sure that you are equipped with two Broadhead Arrows and two Rope Arrows, because you will need all of them to reach the well-guarded house of the local fence John Tallow (aka Yellowface).
Start to the North off the fence's shop, which is located high and seemingly inaccessible. Approach there by getting to the street to the area watched over by several guards. Start by using the Broadhead Arrow on the bridge shown in the above screenshot, which will lower the plank, which is inaccessible for now.
Turn left now and use the Rope Arrow on the interactive catch shown in the above screenshot. After you do, grab on to the rope and reach the small balcony. You now need to force the window open and cross the empty apartment. Force another window open, thanks to which you will reach a few planks located above.
Stand on the single wooden beam and look up, which will allow you to locate the second interactive catch shown in the above screenshot. Again, you need to use a Rope Arrow here. Grab on to the rope, climb to the very top and jump to reach the balconies on the very top.
You can now go towards the fence's apartment, by jumping over to the fragment of the rooftop, of the neighboring building. There are bars in the window here, but there is an easy way in which to solve this problem. Select the broadhead arrow from the inventory and aim it at the apartment's interior, at the switch shown in the above screenshot. Performing this action will unblock, for you, the path to the fence's shop [Stonemarket - Yellowface's Office].
From the main area, collect the Earrings - 12G and a note (Stonemarket - John Tallow's Blacklist). Then, examine one of the bookshelves to locate the switch, whose pressing will gain you access to the secret chamber. In here, you will find a Pile of Coins - 2x5G and a Coin Purse - 30G). At this point, this mission ends.