Perhaps the most curious of all the burial grounds of the Bronze Age is one which has been lately explored at Bleasdale in Lancashire, and which may be compared with the wooden chamber in the neolithic Wor Barrow on Cranborne Chase.[745] Here, on a moorland knoll surrounded by an amphitheatre of hills, is a circle made not of stones but of wooden logs closely planted in a trench, and containing a smaller circle, which consists of a bank with a ditch on its inner side. Within this ditch is a low mound, concealing another circle of logs, in the centre of which were found two sepulchral urns. The ditch is floored with poles, which may perhaps have been trodden by worshippers who walked in ceremonial procession around the grave; for the bottom of a ditch surrounding a barrow near Blandford, which was opened towards the end of the last century, was worn into a smooth track by human feet.[746]
Hardly less remarkable is a circle near Port Erin in the Isle of Man, formed of eighteen cists, in six separate sets, each composed of three arranged in the shape of the letter T, two being placed end to end along the circumference, while the third extended outwards at right angles.[747]
In Britain, as in other countries, cenotaphs were erected in honour of the dead whose remains could not be found. Barrows have been opened within which, after the most careful scrutiny, not the faintest indication could be detected of any burial, although in one there was an empty urn and in another a small stone pavement, enclosed by a miniature stone circle and resting upon burnt earth, which suggested that an ideal cremation had been performed.[748] It seems possible that Silbury Hill was a monument of this sort. This stupendous earthwork, which commands the Bath road, six miles west of Marlborough, is one hundred and thirty-five feet high and covers about five acres. The cost of its erection at the present day would be not less than twenty thousand pounds.[749] In 1777 a shaft was sunk from the top to the bottom; and in 1849 a tunnel was driven from the side to the centre. No trace of burial was found:[750] but even primary interments were not always made at the centre of a barrow; and the labour of proving, if it could be proved, that Silbury Hill was not erected over a grave would be out of all proportion with the result. At all events its purpose was connected with sepulchral usage. Recent excavations in the meadow west and north of the hill are believed to have shown that it was originally surrounded by a trench, which was filled with water; and a local antiquary has suggested that the mound was an artificial stronghold![751] But what clan would have undertaken this herculean labour in a district where every hill was suitable for defence, and of what use would the mound have been for such a purpose?