[The necessary delay is a sufficient compromise, letting Walter prioritize his thoughts and worries in a way that doesn't leave him stewing in them.

Russell is out much of the day still, so apart from leaving him a message for when the man got home - and a general check-in with Ben's aunts - Walter didn't have to give much advance warning.

He doesn't go too far out of his way to time his arrival, but he still manages to get there before Ben does.

He keeps any awkward shifting to a minimum.