First of all, then, for a few words on the geology of the Forest; for upon this everything depends—not only the scenery, but its Flora and Fauna, the growth of its trees and the course of its streams. Throughout it is composed of the Middle-Eocene, the Osborne and Headon Beds capping the central portion, with their fluvio-marine formation. The Upper Bagshot develops itself below them, and is succeeded by the Barton Clays, so well exposed on the coast, and finally by the Bracklesham Beds, which crop out in the valley of Canterton, trending in a south-easterly direction to Dibden.

Here, then, where the New Forest stands, in the Eocene period, rolled an inland sea, whose waves lashed the Wiltshire chalk hills on the north, moulding, with every stroke of their breakers, its chalk flints into pebbles, dashing them against its cliffs, as the waves do at this very hour those very same pebbles along the Hurst beach. Its south-western boundary-line between Ballard Head and the Needles was rent asunder by volcanic action, and the chalk-flints flung up vertically mark to this day the violence of the disruption.

Long after this the Isle of Wight was altogether separated by the Solent from the mainland, but still ages before the historic period. The various traditions, as to the former depth of the channel, how Sir Bevis, of Southampton, waded across it, how, too, the carts brought the Binstead stone for building Beaulieu Abbey over the dry bed at low water, have been previously given. The passage, too, in Diodorus Siculus has been already examined,[265] and there can be no doubt, notwithstanding his also making it, like the traditions, a peninsula at low water, that his Ictis is the Isle of Wight and not St. Michael’s Mount. The mere local evidence of the mass of tin, the British road—more like a deep trench than a road—still plainly traceable across the Forest, the names along it corresponding with that of its continuation in the Island, would alone, most assuredly, show that this was the place whence the first traders, and, in after-times, the Romans, exported their tin. We must, however, remember that the channel of the Solent was caused by depression rather than by excavation; and that at this moment an alteration in the levels, as noticed by Mr. Austen,[266] is going on eastward of Hurst Castle.

The drift, which spreads over the whole of the New Forest, is not very interesting. No elephants’ tusks, or elks’ horns, so far as I know, have ever been discovered. A few species of Terebratula and Pecten, some flint knives, and the os inominatum, of probably Bos longifrons, mentioned farther on, are the only things at present found. Still, in one way, it is most interesting, as completely disproving the Chroniclers’ accounts that, before its afforestation by the Conqueror, the district of the Forest was so fertile. The fact is a sheer impossibility. No wheat could ever be grown on this great bed of chalk-gravel, which is varied only by patches of sand.

But nowhere, perhaps, in the world can we see the stratification of the upper portion of the Middle-Eocene better than at Hordle and Barton, as the sea serves to keep the different strata exposed. The beds dip easterly with a fall of about one in a hundred, though, at the extreme west, at High Cliff, it is much less, and here and there in some few places they lie almost horizontally.[267] At Hordle they seem to have been deposited in a river of a very uniform depth. There is but one single fault in the whole series, just under Mead End, where all the beds have alike suffered. Here and there, however, they are deposited with an undulating line; and here and there, too, a rippled surface occurs, caused by the action of small waves. The river appears to have varied very much in the amount and force of its stream, as some of the beds, where the shells are less frequent, have been deposited very rapidly, whilst others, where the organic remains are more abundant, have been laid on very slowly and in very still water.[268]

It will be impossible to examine all the beds. One or two, however, may be mentioned. And since the beds rise at the east we will begin from Milford. First of all, at Mineway, there runs a remarkable band of fine sand, the “Middle Marine Bed,” discovered some twenty-five years ago, by Mr. Edwards, and subsequently successfully worked by Mr. Higgins. It is seldom, however, exposed for more than a few yards; but that is sufficient to show, that after the elevation of the beds beneath they once more subsided, and the sea came over them again, and after that they were once again elevated.

Just below Hordle House rises the “Crocodile Bed,” running out of the cliff about three hundred yards from Beckton Bunny. The lowest part of it teems with fish-scales, teeth, crocodile plates, ophidian vertebræ, seed vessels, and other vegetable matter, very often mixed in a coprolitic bed, just beneath a band of tough clay, the specimens being more frequent to the east than the west. The accompanying section (I.) will, perhaps, not only serve to show the situation of the bed, but also those above and below. My measurements will be found to differ slightly from Sir Charles Lyell’s[269] and Dr. Wright’s;[270] but this is owing to their having been taken in different places.

Immediately under the “Leaf Bed,” which, as seen in the opposite section, rises from the shore to the west of Hordle House, comes the lowest bed of the Lower Freshwater Series, formed of blue sandy clay sixteen feet in thickness, from whence Mr. Falconer obtained so many of his mammalian remains.[271]

Section I. of Hordle Cliff, a little to the west of Hordle House.—The beds here incline at an angle of 5°.