After giving TyBosso the news about Kirich, Viola has a job for you. Seems like you've become a trusted member. She wants you to pay Lord Colin a visit. He borrowed some money 2 years ago in order to start a new life out in the desert. But in all that time he hasn't paid anything back. They have grown tired of waiting and want you to go and collect the debt. There's a generous reward if you are successful. Lord Colin reside in El-Darrag. it's a short walk to the northeast.
As soon as you talk to Lord Colin it's plain he's not going to pay up today, if ever. He becomes belligerent and attacks. He's as bad of a fighter as he is a businessman.
You collect the gold as his corpse grows cold and head back to Viola. She's impressed that you were able to collect so quickly. She says if you are interested in any more work for the family, talk to TyBosso.
This ends part 7 of the chain quest. Talking with TyBosso starts part 8, Collecting Desert Weed - Shadow
Hirelings and Escorts