2 days later,
Black Swan Samuel decided he had enough of the nomad lifestyle and decided to return home.
When I got out of the shower this morning, Lewis was in the window sill meowing like crazy. I took a peak out the window and sure enough, there was Sam sitting on the back step.
.....I may or may not have cried when I saw this. I was so relieved.
That little bastard is grounded until further notice. All outdoor privileges have been revoked.