Find Duchess's Stash

Find Duchess's Stash is a miscellaneous quest in Fallout 76.

Quick walkthrough
The Duchess was the criminal leader of a crime gang and hid a stash containing some good supplies. The following items contain clues about the quest:
 * Case notes: Duchess - located in Welch
 * Your order's arrived - located in The Rusty Pick on a large wooden table in the center of the room at the end of the mines.
 * Surveillance system tape - 8/08/77 - located in Welch