THOUGHTS
ON A
PEBBLE
REEVE, BENHAM, AND REEVE,
PRINTERS AND PUBLISHERS OF SCIENTIFIC WORKS,
KING WILLIAM STREET, STRAND.
Painted by J. J. Masquerier.
Engraved by Samuel Stepney.
GIDEON ALGERNON MANTELL, L.L.D. F.R.S
Vice-President of the Geological Society &c. &c.