how the dharma guys knew about the island.

magnus hanso is the captain of the blackrock. alvar hanso is the co-founder of the dharma initiative.
we know magnus is buried on the island via the blastdoor map. but what i want to know is how does kate keep her curls from being frizzy with all that humidity?

Magnus Hanso, I believe, was the ship's first mate. I think that Richard was the captain. What I want to know is... why is the Hanso family selling this ship's log? This must be how DHARMA heard of the island originally.

they are selling it because they want money and because they know that no one is gonna figure out how to get to the Island by reading the ship's log.

Magnus Hanso was the last known owner of Black Rock.