But this slab of black basalt was different from anything that had ever been discovered.
Then I come on a slab of gray stone upstanding about fifteen feet.
The slab moved upward an inch or two, grating in its rough grooves.
Steenie stood smiling and undecided on the slab in front of the doorstep.
Taking up a Bondon, she turned it round, and put it down on the slab again.