might perhaps at this distance of time be uncertain whether the moment
was really what I have roughly given, within a geological age or two,
the period of the Mid-Miocene. But existing remains on one of the
islands constituting my group (now called in your new-fangled
terminology Santa Maria) help me to fix with comparative certainty the
precise epoch of their original upheaval. For these remains, still in
evidence on the spot, consist of a few small marine deposits of Upper
Miocene age; and I recollect distinctly that after the main group had
been for some time raised above the surface of the ocean, and after
sand and streams had formed a small sedimentary deposit containing
Upper Miocene fossils beneath the shoal water surrounding the main
group, a slight change of level occurred, during which this minor
island was pushed up with the Miocene deposits on its shoulders, as a
sort of natural memorandum to assist my random scientific
recollections. With that solitary exception, however, the entire group
remains essentially volcanic in its composition, exactly as it was when
I first saw its youthful craters and its red-hot ash-cones pushed
gradually up, century after century, from the deep blue waters of the
Mid-Miocene ocean.

All round my islands the Atlantic then, as now, had a depth, as I said
before, of two thousand fathoms; indeed, in some parts between the
group and Portugal the plummet of your human navigators finds no
bottom, I have often heard them say, till it reaches 2,500; and out of
this profound sea-bed the volcanic energies pushed up my islands as a
small submarine mountain range, whose topmost summits alone stood out
bit by bit above the level of the surrounding sea. One of them, the
most abrupt and cone-like, by name now Pico, rises to this day, a
magnificent sight, sheer seven thousand feet into the sky from the
placid sheet that girds it round on every side. You creatures of