Dutchman's instructions

The Dutchman's instructions is a note that can be found and obtained in the Commonwealth in Fallout 4. Upon acquiring this note off of the body of the Dutchman, it is revealed that he was sent to meet with Helena in order to secure a drop-off, yet was killed by the local feral ghoul infestation before he was able to complete the drop successfully. Near the sentry tower, the woman that was sent to meet with the Dutchman can also be found killed by the feral ghouls, and should the Sole Survivor explore the nearby traincars, they may find a blue barrel with ammo and a pipe rifle.

Location
This note can be looted off of the corpse of the Dutchman himself at Bedford Station.