After talking with Kate and Declan, Will thought it less likely that Druitt was behind this and more likely it was another stupid island trick, so he decided to go and wait in the last place he'd seen Magnus--their hut. If she suddenly had some new power and was freaked out by it, she'd probably try to get back to the last place she'd seen Will. So he went back there to wait. No sign of her yet, and he wasn't sure how long he could make himslef wait before he wanted to go look for her again.