A scientist attempts to transfer his physical attributes and mental capacities into various lab animals.

"It was twilight when Doctor Jerome reached the ogre's castle. He moved through the fairy land of a child's picture book -- a realm of toering mountain crags, steeply slanting roads ascending to forbidden heights, clouds that hovered like beatded wraiths watching his progress from on high."

Weird Tales (July 1944)
The Living Demons (1967)
Complete Stories of Robert Bloch -- V 1: Final Reckonings (1990)