These discrete notices can be spotted in the Crone and Mur:

Got blood that needs spilling, but too busy or important to pick up an axe and do it yourself? No problem, so long as you've got a bit of coin.

Meetings can be scheduled to go over the basics and discuss prices. Don't waste my time. Leave a note for the Favored Son.

Troublemakers will be dealt with.

Posted in Thomas' and at Mur:

Corpses for Sale

Resources for experimentation can be had without getting blood on your clothes or grime under your fingernails. Practitioners of the dreaded dark arts with a bit of extra coin need not leave your studies to waste time killing, draining, and preparing product for practical use.

Prices dependent on market value. Make an appointment.

Leave word for the Favored Son

At Mur:

Authentic Duergar Poetry

Rhymes and limericks from the eternal toilers on nearly any subject. Rates vary, but requests for respectable topics like whipping whores and murdering surface dwarves will probably be cheaper.

Write to the Favored Son to schedule an appointment.