The Smuggler Note is on the dead smuggler Ellie takes her flashlight from, in the flooded subway near the Capitol. After swimming under the debris and the train, look to the left of the tunnel.
The note sets up a meeting with Frank, an outside trader who wants into the Boston zone, at the Park Street subway exit by the Capitol, with forged visa and zone papers attached. It warns of clickers and stalkers below.
The carrier added his own lines: he has waited two hours, keeps seeing movement in the dark and plans to give up in fifteen minutes. He never made it out.
The Frank in this note is Bill's partner from the next chapter. He was bitten in Lincoln before he could make the meeting, which is why the smuggler waited in vain.
Davidson's Firefly Pendant
Davidson's Firefly pendant lies underwater in a stone rotunda in The Capitol Building section of The Outskirts. It belonged to Melinda Davidson and is easy to swim past.
Evacuation Leaflet
The Evacuation Leaflet is an old FEDRA warning on the right-hand pavement in downtown Boston. Once you climb the collapsed street and Tess and Ellie start talking about the bombing, look by the base of a traffic light a car has hit.
Field Ops Log
The Field Ops Log is a soldier's patrol record inside the Goldstone Building, the tilted skyscraper downtown. Climb the stairwell toward the fifth floor; it lies beside the second dead soldier, along with a couple of 9mm rounds.
Firefly Map
The Firefly Map is a note on a dead Firefly in the subway station downtown, on the stairs between the two escalators. It is the body to the right of the one carrying a Molotov cocktail.