On June 19th, 1880, the exploration of Kent's Hole was brought to an end. It was the most complete and systematic investigation of a cavern that had ever been undertaken, and on a much greater scale than that at Brixham. A task of this kind is peculiarly exacting. It cannot be entrusted to workmen; it cannot be left to a committee whose members pay but intermittent visits: it demands the constant oversight of one man; and this superintendence was given to Pengelly. The total amount spent on this exploration was £2000. Pengelly states in one of his papers that in the fifteen and a quarter years during which the excavation was in progress he visited Kent's Hole almost daily, and spent over the work, on an average, five hours a day.
"Above the stalagmite, and principally in the black mould, have been found a number of relics belonging to different periods, such as socketed celts, and a socketed knife of bronze, and some small fragments of roughly smelted copper, about four hundred flint flakes, cores, and chips, a polishing stone, a ring (made of Kimmeridge clay), numerous spindle whorls, bone instruments terminating in comb-like ends, pottery, marine shells, numerous mammalian bones of existing species, and some human bones, on which it has been thought there are traces indicative of cannibalism. Some of the pottery is distinctly Roman in character; but many of the objects belong, no doubt, to pre-Roman times."
What was found beneath the stalagmite belonged to a long anterior period, where it had lain sealed up for, at the very least, two thousand years. In this deposit of the cave earth were found a large number of chips, flakes, and implements of flint and chert, stones that had served as pounders, and some pins, needles, and harpoons of bone.
Some mammoth bones were found in Kent's Cavern, and those of the cave lion, the sabre-toothed tiger, the glutton, cave bear, woolly rhinoceros, horse, reindeer, and beaver.
Mr. W. Pengelly died on March 17th, 1894.
A writer in the Transactions of the Devonshire Association for 1894 says: "For science he lived, and for science he laboured, even long after the age when the average man seeks rest and quiet. Starting out in original lines of thought, and untrammelled by traditions of years long ago, he met with many rebuffs, and the conclusions which he derived from his investigations and minute and patient inquiry were almost laughed to scorn. But he adhered to his work and clung to his beliefs, with enthusiastic devotion, and in the end he lived to see even those who had originally stoutly opposed his views convinced of their verity, and their inestimable value to archæological and geological science."
Pengelly himself left this piece of advice to the student:—
"Be careful in scientific inquiries that you get a sufficient number of perfectly trustworthy facts; that you interpret them with the aid of a rigorous logic; that on suitable occasions you have courage enough to avow your convictions; and don't be impatient, or annoyed, if your friends don't receive all your conclusions, or even if they call you bad names."
It must be remembered that Pengelly and Sir Charles Lyell were those who startled English minds with the revelation of the enormous period of time in which man had lived on the earth, and of the slow progression of man through vast ages in the development of civilization. How that he began with the rudest flint implements, and progressed but very slowly to the perfection of these stone tools; how that only in comparatively recent times did he discover the use of metals and pottery; how of metals he first employed bronze, and not till long after acquired the art of smelting iron and fashioning tools and weapons of iron. All this startled the world, and men were very unwilling to accept the doctrine propounded and to acknowledge the facts on which this doctrine was based.
The Life of William Pengelly was written by his daughter Hester Pengelly, and published by Murray, 1897. Reference has been made as well to the obituary notice in the Transactions of the Devonshire Association for 1894.