Last of His Line is received at the start of Act 2 if Hawke sided with Renvil Harrowmont during the Act 1 quest of the same name.
Letter[]
I do not know if you remember me, but you helped me deal with the Carta a few years ago. Given the generally disreputable characters in Kirkwall, I had all but given up hope, and I swore I would reward you properly. Take these coins and the enclosed package.
My men and I are preparing to leave Rivain before King Bhelen's assassins catch up with us again. If the Stone favors us, we'll find Kal-Sharok and safety soon. If the Harrowmonts survive this dire time, your name and deeds will be recorded in the memories.
With respect,
Renvil Harrowmont