The Underground Railroad Dragon Age II Guide

Received from: reading the message by the desk [Hightown - Hawke Estate]

You can start performing the task after checking the desk in Hawke Estate (M14, 12) because you will get a message titled The Underground Railroad #1. You will get the message only if earlier you passed the main quest Act of Mercy and you chose one of solutions which allowed to free the apostates (they couldn't be arrested by the Templars). If you want to help apostates, click on Accept. Now you can leave the mansion and during the day to localization [Docks - Western area of warehouses]. Here find Mrs Selby #2 (M19, 10).

No matter which dialogue option you choose, you will help apostates who are in Kirkwall #1. Mechanism is similar to the Chanter's Board and the desk in the hero's mansion. On the right from the place where Mrs Selby is standing you will find a table #2, and from time to time the proposals of tasks to perform will appear.