Note from Sokolov is a written note found in Dishonored 2.
It's true, I don't tinker with mechanical devices much anymore, but I'm not so old as to be useless just yet.
Behold! I have fashioned a little contrivance for you, using only parts scavenged from this wretched vessel. Yes, all right, a few bits were currently in use, but I assure you none were involved in keeping us afloat.
Say nothing to Meagan, as her disposition needs no further souring. In any case, may this device serve you well.
The note can be found aboard the Dreadful Wale on a table in front of Sokolov's quarters after the mission The Royal Conservatory.