Hi,
And don't discount the top shelf either.
Most of the time people find them within ten feet of their enclosure - chack back through all the lost snake threads for tips like poly bags and flour etc.
And good luck finding him soon.
**edit**
You found it while I was typing. Now that you have her back remind me later to give you a row for leaving a mouse in with her unattended :p
**end edit**
dr del