The last observable signs were Wednesday morning, i.e., gnaw marks on the poison bait block and removal of peanut butter from the trap. No carcass found under the oven or behind the fridge. No smell of rotting carcass anywhere. So where's my little meecie?
Incidentally, I placed three of those rectangular-shaped poison blocks in the (detached) garage yesterday, and today they are almost round-shaped. Looks like there was quite a Thanksgiving feast. This will hopefully prevent them from nesting in the tractors.
To sum up this experience, the blocks worked better than conventional traps with peanut butter, electronic trap with peanut butter, or poison pellets. He removed the peanut butter from conventional traps on three occasions. He apparently got a jolt from the electronic trap but it wasn't fatal and, notwithstanding the manufacturer's claims, he was able to get out of it, leaving behind most of the peanut butter. He didn't return to that trap. And he totally ignored the paper bag of pellets.
Next time, the poison blocks will be the treatment of choice. Mary