Boulders to Building Blocks
Large sandstone boulders that had broken off from the cliff above provided material for the fort walls. First the boulders had to be reduced to manageable building block sizes. Then newly split blocks were hauled downhill to the job sites, riding on a lizard, the fork of a juniper trunk used as a sled.
Masons hand-drilled holes into sandstone blocks on this slope. You can still see drill-hole scars today on the walls of Winsor Castle. Wooden pegs were then driven into the holes, and drenched with water. As the wet pegs expanded, the fine-grained sandstone split into blocks.