Entombed Animals
An' I ain't talkin' 'bout Egypt, neither! Peep this:
It is one of the strangest phenomena reported. Something that can't happen, but stories saying it does turn up again and again anyway. Stories of animals found alive locked deep within stone or wood, with no observable way they could have entered. This is the mystery of entombed animals:
Being at my seat near the village of Meudon, and overlooking a quarryman whom I had set to break some very large and hard stones, in the middle of one we found a huge toad, full of life and without any visible aperture by which it could get there...The laborer told me it was not the first time he had met with a toad and the like creatures within huge blocks of stone...

Very interesting stuff here. Dig it at:
http://unmuseum.mus.pa.us/entombed.htm