Ockleton, Morpurgo, Cornelius, Dysart and half a dozen others too drunk to mention. But there was so much coming and going that any one of us could have slipped out, pushed Everett through the window and slipped back again without being noticed. Damn it all we didn't even notice Everett was missing until a porter tripped over him in the quad so anything's theoretically possible.
Multi-choice question: Can we infer the following?
Everett was missing

Select from:
[A]. Yes.
[B]. No.
[C]. It's impossible to say.
[A].