There are four spots in Berkshire which claim the honour of being the Œscendun of the chroniclers, where Æthelred and Alfred gained their great victory; they are Ilsley, Ashamstead, Aston in the parish of Bluberry, and Ashdown, close to White Horse Hill. Now it seems clear that Ashdown was, in Saxon times, the name of a district stretching over a considerable portion of the Berkshire chalk range, and it is quite possible that all of the above sites may have been included in that district; therefore, I do not insist much upon the name, though whatever weight is to be attached to it, must tell in favour of the latter site, that of Ashdown. Let us, however, consider the other qualifications of the rival sites.
That of Ilsley is supported, so far as I know, only by Hewitt in his antiquities of the Hundred of Compton (1844); and his argument rests chiefly on the fitness of the ground for the scene of a great battle. He tells us that the detachments of three Waterloo regiments, marching through Ilsley in 1816, when they came to the spot, stopped and called out, “Waterloo! Waterloo!” to one another. He also states that the name Ilsley is, in fact, “Hilde læg,” the field of battle; but as he has no tradition in his favour, and cannot, so far as I know, point to any remains in the neighbourhood in support of his theory, I think his case must fail, and only mention it to show that I have not overlooked the claim.
Ashamstead, situate five miles to the southeast of Ilsley, is named by the Lysons in their topographical account of Berkshire as the probable site of the battle, but they give no reasons, and are unsupported by tradition or remains.
Aston has a stronger case. It is situate between Wallingford and Ilsley. The range of chalk hills rises just above it, and one detached hill is here thrown out into the vale, on which are still visible considerable earthworks. There is a chapel called Thorn Chapel on the eastern slope of this hill, and I am told there is a tradition that this chapel was built on the spot where some Saxon king heard mass on the morning of a battle. It is suggested by Mr. Lousley and others, that the Saxons occupied this outlying hill, the Danes the opposite range; and that the battle was fought in the valley between, where, when the road was recently altered, a number of bones were found, apparently thrown in together without care, as would be the case after a battle. There are, however, no regular barrows or other remains. Bishop Gibson is in favour of this spot, on account, as it would seem, of a passage in the Saxon Chronicle for the year 1006, which runs as follows: “They” (the Danes) “destroyed Wallingford, and passed a night at Cholsey.” Then they “turned _along Ashdown_ to Cwichelmes Low.”