Caesar plunders through the Hydra Station office, Ilana interrupts

This week's episode started with a mysterious scene in a dark office which we later learn is an office in the Dharma Initiative's Hydra Station. Caesar is rummaging through the office and finds a Life magazine from April 19, 1954 with a cover story about hydrogen bomb tests. He then breaks open a file cabinet and pulls out a file folder. The folder contains a copy of a page from Daniel's journal (photos 17 and 18: we saw this page in the journal in "The Constant") and an updated version of the map Daniel and Charlotte used to find The Tempest (photos 15 and 16: we saw this map in "The Other Woman") . it also contains one of the maps of the island that Danielle Rousseau had (photos 13 and 14).

Caesar then finds a loaded gun under the desk and puts it in his bag. Ilana walks in and asks what he put in the bag and Caesar lies and pulls out a flashlight which he tosses to her. She then tells him that someone named Roxanne was scouting just south of where they are and found a man standing in the water wearing a suit. We learn moments later that the man was John Locke. More on that in the next post.

So when are they on the island and how long have they been there? They know each other's names and are already scouting the island, so how much time has passed since they got to the island? Also, what is Caesar up to and why is he hiding a gun? It feels a bit like the secrets kept between the 815 surivivors in the first few seasons.