It has occasionally happened, however, that no central interment has been recorded. In some cases we may suspect that the explorers had forgotten that the primary interment is sometimes in a deep grave below the natural level. On the other hand, carelessness on the part of those who originally raised the mound may account for the interment being out of the centre. The same result has been brought about by additions to the original mound upon the occasions of new interments, for the Bronze folk were not always content with merely inserting these into an old mound. Sometimes the additional matter formed a capping. A barrow on Ballidon Moor[23] furnishes a good example of this; it had an inner cairn containing several interments, and was surmounted with a thick layer of earth, at the foot of which was an ashy stratum representing the site of a funeral pile, while in the earth above were the cremated remains derived from it. It was evident, therefore, that this capping was added on this occasion. More often the later mound was thrown up against the side of the old one. The smaller chambered cairn at Mininglow[24] was found to have had a mound of earth cast up against its side, and this had been raised over the spot where a man had been cremated, with whose remains were a bronze dagger, part of a bone implement, and some “good flints,” all of which had passed through the fire with their owner; and at Five Wells, Mr. Salt found a secondary interment of Bronze Age type, consisting of a contracted skeleton in a small cist, which had been constructed against the podium of the chambered cairn, and covered with stones and earth—two interesting proofs of the greater age of the chambered tumuli. These additions are not easily detected if their materials are similar to those of the parent mounds, but their effect may be apparent in the superficial irregularities they give rise to. Not a few Derbyshire examples could be given which probably owe their irregularities to this cause. [23] _Ten Years’ Diggings_, 57. [24] _Ibid._ These illustrations will have given the reader an idea how the sequence of interments is determined. Many years ago the writer tabulated the sequences in all the Derbyshire (including the Staffordshire) barrows containing more than one interment each, of which reliable information was obtainable. When those associated with vessels, other than cinerary urns, were classified, some significant results were obtained. The distribution of the vessels was as follows: Twenty-nine drinking-cups, all associated with unburnt interments; Sixty-five food-vases, of which forty-eight were associated with unburnt and seventeen with burnt interments, but none of these in cinerary urns; and Eleven incense-cups, all with burnt interments, and nearly all in cinerary urns.