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.
The writer is fed up: Robert bosses his crew around, still has not paid them, and wears a ponytail the writer hates. Worse, some of the most dangerous people in the city are after Robert, and the writer worries what happens when they learn who helped him.
Those dangerous people are Joel and Tess. Joel's reaction on reading it is a dry remark that Robert annoys everyone he meets.
Shipping Manifest
The Shipping Manifest is a sailor's note at the Mission Hill Pier docks. After you vault the wall down among Robert's patrolling men, go right to the railing above the water; it lies by a fishing net behind a blue trash bin.
Warehouse Key
The Warehouse Key unlocks the back door of the S&B Co. repair shop on the way to the docks. After Joel and Tess drop through a hole in a fence toward the wharf, four of Robert's smugglers appear; whoever you take down last drops it.
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.
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.