I have installed him in Mortimer's former aquarium and provided him with food and a water bottle and a safe wheel (not the wire kind, plastic, nothing to catch his little tail or toes) and the little mouse house that Mortimer liked so much. He explored it thoroughly and rearranged the old socks I had in there and crawled under them for a nap. His name is Soon Henry Holstein (long, long story, he'll be "Henry" for everyday) and while he won't quite let me pet him, he's not really afraid of my hand. He sniffed it and didn't run away from it. I think we'll be friends in no time.
Hubby said, "He's BIG" but that's only because he's so much bigger than Mortimer was. I'll get a photo once he's settled in and willing to pose. I thought he needed a nap after all the excitement instead of me flashing my camera at him.
Of course, immediately after I got Henry settled I found one of the house mouses dead. Out of Henry's sight, I'm glad to say. Don't want to traumatize the poor dear.
This is how nice a husband I have. I came in bearing Henry in a box and hustling around getting him all set up and he watched this in silence for several minutes before he said, "Do you have a new pet?" in the same tone you'd say, "Do you have a new shirt?" and I had not consulted him.