As Mr. Morrow states, the choice of centre of the circle may alter the azimuth obtained by as much as “a few degrees,” but the value obtained from the Ordnance map is, definitely, N. 51° E., and with the height of hills determined by Mr. Morrow this would suggest that the N.E. circle was really erected to provide the alignment, from the centre of the great circle, or from the Cove, to the summer solstitial sun, about the year 870 B.C., Stockwell’s values for the obliquity being taken. This result is the more striking as it gives a date for the substitution of the June for the May worship at Stanton Drew, which is in full accordance with that obtained for the similar change at Stenness. There is other evidence, to which I attach importance, as it deals with a method and policy found in many temple fields in Egypt, that of blocking the alignment of an older star- or sun-cult, which the astronomer-priests replaced by their own. The stones of the avenue of the solstitial N.E. circle I expect once blocked the May sunrise line from the great circle; judging from the Ordnance map, and remembering the number of stones that have disappeared, this is probable if not certain. If this were so, then the N.E. circle was the last to be erected, and this suggestion is strengthened by Mr. Lewis’s statement that it is the most perfect of the three. Prof. Lloyd Morgan concludes his interesting account of which I have made so much use with the following remarks: “In what order the circles were constructed we do not know. Whether the small N.E. circle with its more massive megaliths preceded or succeeded the great circle with its more numerous but, on the average, less massive stones, is a matter of mere conjecture. They may have been contemporaneous: but it is more likely that so large a work took a long time in execution; nor does the unity of plan of the final product preclude a gradual process of development. Finally as to the purpose of the erection, and its hidden astronomical, mythological, or social meaning (if it have one), we are once more at the mercy of more or less plausible conjecture. There stand the circles in a quiet Somersetshire valley, silent memorials of a race concerning whose modes of life, of labour, and of thought we can but speculate.” It is to be hoped that before the monument has disappeared like so many of its fellows, some student with more knowledge and time to devote to the inquiry than myself will endeavour to answer more of the questions raised by it. [23] With regard to these values Mr. Morrow writes: “At present Hauteville’s quoit is not visible from the centre of great circle. If the stone were erect, however, and any intervening trees and walls removed, the top of the stone would no doubt be within view. The Hauteville quoit line is thus rather a difficult one to obtain with accuracy, but the azimuth given should be correct to the nearest minute.” CHAPTER XVIII FOLKLORE AND TRADITION