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Prior to arrival on the island

After the events of LaFleur, Daniel along with Sawyer, Juliet, Miles, and Jin are shunted through time and stranded sometime in 1974. Sawyer is able to bluff the Dharma Initiative of this time into giving his "crew" jobs/positions within the Dharma Initiative on the island. Daniel would end up assisting the group in the construction of the Orchid Station. This appears to have taken place in the late 1970's. Presumably, much of the information about the Dharma Initiative that Daniel would end up compiling in his notebook...