I'm certain that jstan would be delighted if you took his mouse off his hands. In fact, he may have several. John may still be in Joshua Tree, working on his cottage and visiting with the neighbour - he seems to go for a week or two at a time, to make the trip worthwhile. This time he was working on the plumbing, plus trying to rodent-proof the outside of the cottage. They invaded, live in the walls, and can be fairly noisy at night.
The mouse may be a different species than those found in Seattle, but that seems a relatively minor concern.