Easily picks a lock

What he did find during his search was a sealed door. It had been locked
from the outside. The key was missing, but to Larten – Quicksilver, he’d
told them, as if by using a different name he could distance himself from
the guilt – it was a simple thing to pick. Moments later he pushed the door
open, and four terrified pairs of eyes stared out at him.

One of the four was a high-ranking mate. Larten immediately
understood why he had spared this man—even in his murderous rage, he’d
known that he would need someone to steer the ship.

***

The Saga of Larten Crepsley: Ocean of Blood, Chapter 24