To complete one of Sadie Adler’s requests in Red Dead Redemption 2, find the Harmonica. Below we show you the exact location of the harmonica in RDR2.
The harmonica is located east of Flatneck Station, on a small courtyard. If you have 5 items in total, you will receive the following trophy / achievement:
Deliver 5 camp companion item requests.
You find Sadie Adler at your camp, just outside, in a shrubbery by the water.