The Wanted Poster is a FEDRA notice pinned to a bulletin board in the Boston slums. Past the bus where Malick stops Joel, head straight to the fence where a man and woman stand talking; the poster hangs on the board to their left.
The poster is after Marlene, leader of the Fireflies. It gives her description, lists charges from terrorism and murder to forgery and bribery, and warns that she is well protected and popular, so citizens should expect resistance to her arrest. A reward is offered for tips.
Marlene shows up in person later this chapter, and the poster tells you how FEDRA sees her before Joel and Tess cross paths with her.
Drafting Notice
The Drafting Notice is a FEDRA work order lying in a heap of papers in the Boston slums. After the bus where Malick confronts Joel, walk straight on between a vendor's stall on the left and a canopy on the right; the notice is on the ground at the corner.
Boston Q.Z. Map
The Boston Q.Z. Map is the first artifact in the game and you cannot miss it: it is already inside Joel's backpack when you pick the bag up off a table in the smuggling tunnel during Beyond the Wall.
Docks Note
The Docks Note is a gripe from one of Robert's smugglers, lying in the big warehouse at Mission Hill Pier where a fishing boat hangs over the loading bay. Look on the right side, against the railing behind a blue trash bin.
Note to Brother
Note to Brother is a handwritten letter on a table upstairs in the spore-filled building of Beyond the Wall. After the first infected fight, climb the stairs, turn left before the hole in the wall and open the closed door; the note sits in the next room.