In Polygon’s The Last of Us “The Firefly Lab” collectibles guide, we’ll show you the location of the 4 artifacts and 1 Firefly pendant.
“The Firefly Lab” only has one section: The Hospital, but you won’t see that name as you’re playing the game. You can find, select, and begin playing at any section from the Chapters option on the main menu. We’ll explain where and when each part begins and ends at the top of each section below.
This entire chapter and section takes place in the hospital and the Firefly’s lab, and ends when you leave.
Surgeon’s Recorder artifact location
You won’t find your first collectible in this chapter until you head up to the second floor, so just focus on avoiding or killing the Firefly soldiers for now. When you make it to the stairwell, head up until you hit another door. The Surgeons Recorder will be on the counter in front of you when you exit the stairwell.
Marlene’s Recorder 1 artifact location
Turn to the right, and duck into the narrow room next to the stairwell. You’ll find Marlene’s Recorder 1 inside.
Bryony Stewart-Seume Firefly pendant location
Back on the main floor, hop the counter where you grabbed the Surgeon’s Recorder (or just boringly run around it), and head over to the right. Get through the shiv door to find the Bryony Stewart-Seume Firefly pendant (the last Firefly pendant) and a ton of supplies.
Marlene’s Journal artifact location
Through the door, there’s a tented area with a big Firefly logo on the side. Head inside and into the back room to find Marlene’s Journal.
Marlene’s Recorder 2 artifact location
From there, you’ll head into the surgery wing. After taking out a few more Fireflies, you’ll go through a door and barricade it from the other side. Head into the first room on the right to find Marlene’s Recorder 2, the final artifact, on the far side of the room.