Did the Others know of Desmond prior to him returning to the island at the end of Season 2?

Yes, but they didn't bother him because they needed the button pressed 48% (74 votes)

Yes, but as long as he stayed inside the Swan he wasn't a threat 31% (48 votes)

They'd found his boat and left it, assuming anyone on board had drowned and been washed away 7% (11 votes)

They had no idea of his presence at all 14% (21 votes)

Give others the chance to vote.