Two other attempts were made to get to the bottom; one at 40 feet from the mouth just beyond the large rocks on the surface, and one at 15 feet farther in. The last one started on an area 8 by 15 feet, which would have been ample if the sides could have been carried down even approximately straight. Neither of these efforts met with success, for the same reason that led to the abandonment of the first one.
From here to the end, examinations were confined to the deposit of ashes. The surface, except as it had been disturbed by relic hunters, was practically level from wall to wall, but the depth varied with the undulating top of the clay beneath. Where it was deepest, in the central portion about 50 to 75 feet from the mouth, the deposit had a thickness of 6 feet. From this it diminished to about 3 feet on the sides, with an occasional thinner patch on a narrow shelf formed by a ledge or a crevice. The average thickness was close to 4½ feet, so the amount was not far from 800 cubic yards. This was composed entirely of ashes from small fires for cooking, heating, and lighting purposes, increased to a very limited extent by kitchen waste, and by discarded or mislaid wrought objects. It represented the combustion of many hundreds, perhaps of thousands, of cords of wood, all of which had to be carried in from the hilltop or slopes and passed through the constricted doorway. This labor would be a sufficient guarantee of economical use; we may be sure that no fuel was wasted. If proof were needed of such a self-evident proposition, it would be found in the almost complete absence of charcoal; here and there, but seldom, a small mass of it showed that a burning chunk, covered up, had smoldered until the inflammable portion was consumed. Bunches or handfuls of coarse grass or small weeds had undergone the same process. Perhaps these had been used as kindling.
In all the deeper parts the ashes had been dumped promiscuously, from fires made at other points; no camping fires seem to have been made along the middle of the cave until the depressions in the clay had been at least partially filled. The ashes in the upper 4 feet of the ash beds where these were deepest, and in nearly all the shallower portions, were stratified and usually level, though at the front and rear the strata followed the natural incline of the slopes. The first impression was that the ashes had been carefully spread out, or dragged, to make their surface even; but it was discovered, when shoveling some of them for the second time, that ashes may assume this appearance no matter how carelessly thrown. The ashes at the top, to a depth of 3 or 4 inches, were as fine as flour, and when shoveled back hung in clouds for hours at a time, to the great discomfort of the excavators, whose eyes, throats, and nasal passages were in a state of constant irritation. The stratified or laminated, hard-packed condition below the loose surface means, perhaps, that they were occasionally sprinkled and trampled by the occupants to prevent this trouble. Possibly they were covered with mats, skins, weeds, or leaves, in the parts where the inmates congregated. The loose, incoherent condition of the lower portions, which "shoveled like snow," may denote that only a few persons dwelt here at first, who found ample room on the higher ground near the doorway. However, all such attempts at explanations are not much better than mere guesswork, and we must be content with accepting the facts as we find them.
Where the ashes were white and packed hard, whether on the site of a fire or in thin layers where thrown, they contained very little extraneous material; whereas in the darker, more mixed material broken bones, potsherds, shells, and other refuse were abundant, while there was scarcely a cubic foot anywhere in which was not found a piece of flint or bone, sometimes several such objects, which had been intentionally altered from their natural condition.
Near the center of the cave was a curving pile, 6 by 2 feet, and several inches thick, of mussel shells of every size from less than an inch to above 5 inches in length; more than half of them were over 3 inches. None of them showed any marks of fire; some had both valves in position, as if they had never been opened, and a few of the larger of these had been filled with small shells and closed again. A few were broken, but most of them were entire. About 1,400 valves were in this pile, meaning that at least one-half of that number of mollusks were consumed.
The first interment was found at 46 feet from the front, 14 feet from the east wall. The folded skeleton of a very old person lay on the right side, head east, in loose ashes, on a large flat rock whose top was 30 inches below the surface. This rock had not been placed here, but had fallen from the ceiling; probably its existence was not known until it was uncovered in digging the grave. The skull still retained its shape, in part, being held in place by the ashes, but fell in pieces when this support was removed. A portion of it was gone; two fragments were found, several feet away, not near each other, one of which fits in the skull, and the other probably belongs with it also. The frontal bone is nearly half an inch thick; the sutures partially obliterated; the teeth worn down to the necks, some of them nearly to the bone; the forehead is low and receding. A restoration is seen in plate 20, a, b. In addition to the missing portions of the skull, most of the ribs, half of the lower jaw, and nearly all the dorsal vertebræ were absent, probably having been dragged away by ground hogs. The bones are all light and fragile. Lying above the skull, in contact with it but supported by the ashes on both sides, was half of a large mortar hollowed on both sides. Above the skeleton, and extending for several feet on every side, was an undisturbed stratum of closely packed ashes, 17 inches thick at the middle, which broke off under the pick in large clods; these, of course, had accumulated after the body was interred.
The spongy condition of these bones, in spite of the preservative action of the ashes, is evidence of the fact frequently noted, that with advancing age some change takes place which renders them less resistant to destructive influences. Bones of children only a few weeks old near this skeleton held their structure perfectly and were easily secured.
Ten feet east from the pile of mussel shells, at a slightly lower level, was nearly half a gallon of snail shells which had been boiled, probably in soup. With them were a few pieces of bones.
Scattered irregularly through the ashes were many cavities which somewhat resembled the "postholes" so common beneath the mounds in Ohio. Some were barely an inch in diameter and a foot deep; from this size they varied indefinitely to the largest, which was a little more than 3 feet deep, reaching from about a foot below the undisturbed layers just under the loose surface ashes to within about a foot of the bottom. "About" is used advisedly, because at this point neither the top nor the bottom of undisturbed material could be determined with certainty. The lower 2 feet of this cavity was uniformly 7 inches across; above this it slightly expanded, funnel-like, to a diameter of 8 inches at the top. The sides of this, as of all of them, large or small, were as smooth and hard as if made with a posthole digger or a boring tool. Strata of ashes, not changing their level or appearance in the least, were continuous around the margin. But the holes were not always straight; some of them changed direction as if due to a crooked post or stick. Nearly all of them were rounded, even hemispherical at top or bottom, or both, like the bottom of a pot. They were not molds, for nothing could have been taken out of them without changing or destroying its form. If they had contained any solid substance like a post it must have stood unchanged until the layers of ashes surrounded and covered it, and then must have so completely disappeared as to leave no trace of its existence. They were not formed by driving any object down, because in that case the bottom would not have been so regularly rounded and the ashes around the sides would have been more or less displaced. They were not due to burrowing animals. In fact, if there be imagined a nearly cylindrical mass of ice, straight or slightly crooked, with rounded ends, placed upright and retaining its position unmelted until completely buried, the appearance of these cavities will best be understood. Some of them were filled to the top with fine loose ashes which occasionally contained fragments of bone, shell, and pottery; sometimes they were nearly empty, with traces of decayed wood at the bottom, mingled with a little ashes and charcoal. In one was found a long, perfect bone perforator, shown at a in plate 30; in another near the corner of the west wall was found the pipe shown in figure 14. About 45 feet from the front near the east wall were four of them of different diameters and depths but all in a straight line within a space 2 feet long; these were in front of a crevice under an overhanging ledge where a man could not stand upright. Wigwams may have been erected in the cave, or at least skins stretched to prevent drafts or to confine the heat of fires in winter and perhaps to insure some degree of privacy if this were desired; but there are no present indications of such shelters unless these holes were to secure them; otherwise their purpose or object is still unsolved. They would probably not contain posts for hanging things on when the walls afforded so many small crevices and holes into which poles better adapted for such purposes could be thrust.