Drawing of the Mechanist

Drawing of the Mechanist is a paper note that is added to Fallout 4 through the Automatron add-on.

A crude drawing of the Mechanist. Seems to be drawn by a D.P. This is a reference to the character Derek Pacion, a little boy the player encounters in the Fallout 3 side quest, The Superhuman Gambit.

Location
Found on a desk in Isabel Cruz's room in The Mechanist's Lair

Transcript
Not applicable