Ben in Tozeur, Tunisia + hotel clerk

Here's Ben in Tozeur, Tunisia. We he arrives at the hotel, he checks in under the name Dean Moriarty with the passport Sayid finds in "The Economist." He tells the clerk, Narjiss, that he's a "preferred guest" and then asks what day it is. It's October 24, 2005. Does Ben's means of travel also include time travel?

Ben's (or should I say Dean Moriarty's) passports and money

Sayid finds a lot of foreign currency and a number of passports in Ben's secret room.

The currency that stands out is an English 20 pound note that has Michael Faraday on it (an English chemist and physicist who contributed to the fields of electromagnetism and electrochemistry). This particular bill is no longer in circulation. It was used between 1991 and 2001.

The passports include ones from Brazil, New Zealand, Japan and Switzerland. In Switzerland, Ben goes by the name Dean Moriarty (a character from the Jack Kerouac novel On the Road).