Hidden stash note

The hidden stash note is a holotape

Location
In the sewer, near a couple of skeletons. The section of sewer containing the note and the supplies is entered from either the manhole in the alley east of Seward Square North Metro, or the manhole northwest of Metro Central on Pennsylvania Avenue. The tunnels are patrolled by a few leveled super mutants.

Behind a door in the south part of the local map is a metal stairway leading to the skeletons, where you will find the holotape and a laser pistol. As the note indicates, at the end of the southeast tunnel you will find several ammunition, mine, and grenade boxes, along with a Tumblers Today, in a hole in the wall.