Something more tangible was nearly obtained shortly before Stukeley's time, when Lord Stawell levelled the vallum next the church, where the great barn now stands. The original surface of the ground was "easily distinguishable by a black stratum of mould on the chalk. Here they found large quantities of buck-horns, bones, oyster-shells, and wood-coals. An old man who was employed on the work says there was a quantity of a cartload of horns, that they were very rotten, and that there were very many burned bones among them."[84] On the same page, Dr. Stukeley adds: "Besides some Roman coins accidentally found in and about Abury, I was informed that a square bit of iron was taken up under one of the great stones upon pulling it down." Other Roman coins have, I understand, been found there since, but there is no authentic record of the fact which can be quoted. This is to be regretted; for the presence, if ascertained, of these coins would go far to prove that the erection of the monument was after their date, whatever that may be. Unfortunately no scientific man saw these bones, so no one was able to say whether they were human or not; but the presumption is that they were, for why should burned bones of animals be placed in such a situation? The answer to this is that the Wiltshire Archæological Society have made some excavations at Avebury, and found nothing. In 1865, they tapped the vallum in various places, and dug one trench to its centre, and, as they found nothing, concluded that nothing was to be found. But in a mound 4442 feet long, according to Sir R. Colt Hoare, there must be many vacant spots, especially if the bodies were burnt; and such negative evidence cannot be considered as conclusive, nor as sufficient to disprove the evidence acquired in Lord Stawell's diggings. Stukeley's honesty in recording facts of this sort is hardly to be suspected, though the inferences he draws from his facts are generally to be received with the extremest caution. The Society also dug in the centre of the northern circle, where the dolmen stood, and penetrated to the original chalk, but found nothing except the ruins of the stones which had been destroyed by fire, and express great disappointment at finding "no human bones whatever."[85] If the bodies were burnt--as we should be led to infer from what Lord Stawell found under the vallum--what they probably would have found, had the "Cove" been complete, would have been a vase or urn with ashes. The barbarians who destroyed the stones are scarcely likely to have spared so worthless a piece of crockery; and if it were broken at the time, it would be in vain a hundred years afterwards to look either for it or for bones that in all probability were never laid there. Nor need better results have been expected from their trench, 60 feet long. A man must know very exactly what he is looking for, and where to look for it, who expects to find an object like an urn, a foot in diameter, in a 28-acre field.