Surely all mice are on the small side in any case.

I imagine there must be some reason why there are people who get all knotted up about an illusory search for anonymity. I must have a limited imagination, because I can't imagine what they are in this kind of case.

I suppose he might be worried about someone turning up on his doorstep feeling insulted and vengeful. Hardly very likely though. And I imagine that now's a bit late to worry about that kind of thing.