Victorian Locket and Chain is a treasure found in Uncharted 3: Drake's Deception. It can be found in Chapter 4 - Run to Ground.

Found on top of stack of boxes in corner of ground floor of green door hideout. After getting in through window, getting down one floor underneath entry point to recover Brooch, then back onto pipes, climb through window opening into adjacent room, follow pipes around and down to ground floor, then back into first room that has green roll-up door, and back over to wall with initial window entry and climb up stack of boxes to find this cheap-looking necklace.