hopefully this makes sence
get a bucket and set it up near a ledge thats level enough with the bucket
then get a small light peice of wood a put peanut butter on the end
put the wood running from the ledg to the center of the bucket the side with the peanut butter overhanging the middle of the bucket
and wait, probly will happend overnight
the mouse will hopefully walk along the wood to the peanut butter and his weight will cause the wood to teatertotter and fall and due to the laws of gravity, he will end up in the bucket.
I used to have mice in my basement and this worked for catching them dont know if it will work for catching a single mouse but hey you can give it a try
and this way you dont have to go buy a trap
What did the Spanish fire fighter name his two sons?
Hose "A" and Hose "B"