"Don't worry, John, the boats are surely sturdy and I doubt anything will approach in the water," Sherlock had noticed his friend's worry quite easily, sharp gaze picking up more than just the shiver. "And I can swim, anyway. I'm strong enough to support someone else." He smiled with a nod, cautiously putting a comforting hand of his friend's shoulder. "It will certainly be interesting. And you do not have to worry about being put into Slytherin, that is highly unlikely. You do not have their traits. Although they are not all bullies there. You will most likely be a Gryffindor or a Hufflepuff. Molly will be a Gryffindor or a Hufflepuff as well. And anyway you do get some say in it, I believe, so if you really want to be in a house you can say. Like the hat will try to put me into Ravenclaw but I really don't want to be in the same house as my brother." He made a face, shrugging.
Molly smiled slightly. "I agree with John on the Slytherin bit."