Immediately after writing my last post, I went into the kitchen for some water before going to sleep...and found the mouse in the sink. We held a 10-minute stand-off, I using my most powerful weapon - a bucket - and he using his - a striking resemblance to lovable fictional characters. I finally managed to get him into the bucket, which I placed on the counter while frantically looking for something to cover it with. And in that brief span of time, the mouse managed to catapult himself over the edge of this 18-in. prison and into freedom. Frustrated and exhausted, I set the trap again with sturdier bait and went to bed.
This time, it worked! The next morning, my new frenemy was huddled in the corner of the cage. I was already late to work, so I didn't have time to deal with him. The bread and peanut butter were still in the cage, so I figured he'd be fine until my roommates and I got back from work. And so I ended up with a pet mouse for about 12 hours. A pet mouse who left behind his weight in droppings when my roommate and I finally set him free far, far, far from our house that evening.
Photo of Fievel from here.