Hadrian's invitation is a holotape in Fallout 4.
Location[]
On Hadrian's body, at a random location.
Transcript[]
Carl Everett: Hadrian? Carl. Got a job you might be interested in. You know about Jamaica Plain, right? Place where they hid all that treasure before the war? No one's ever found it, account of all the ghouls. Sal's putting together a raid team. We still need a sniper. Even split of the loot. You up for it? If so, you know where to find me.
Related quest[]
Listening to the tape starts Find the Treasures of Jamaica Plain and adds a map marker for Jamaica Plain.