As almost the whole of the notes which follow deal with the assumption of Stonehenge having been a solar temple, a short reference to the earliest statements concerning this view is desirable; and, again, as the approximate date arrived at by Mr. Penrose and myself in 1901 is an early one, a few words may be added indicating the presence in Britain at that time of a race of men capable of designing and executing such work. I quote from the paper communicated by Mr. Penrose and myself to the Royal Society:-- “As to the first point, Diodorus Siculus (ii., 47, ed. Didot, p. 116) has preserved a statement of Hecatæus in which Stonehenge alone can by any probability be referred to. “‘We think that no one will consider it foreign to our subject to say a word respecting the Hyperboreans. “‘Amongst the writers who have occupied themselves with the mythology of the ancients, Hecatæus and some others tell us that opposite the land of the Celts [ἑν τοις ἁντιπεραν της Κελτικης τοποις] there exists in the Ocean an island not smaller than Sicily, and which, situated under the constellation of The Bear, is inhabited by the Hyperboreans; so called because they live beyond the point from which the North wind blows.... If one may believe the same mythology, Latona was born in this island, and for that reason the inhabitants honour Apollo more than any other deity. A sacred enclosure [νησον] is dedicated to him in the island, as well as a magnificent circular temple adorned with many rich offerings.... The Hyperboreans are in general very friendly to the Greeks.’” “The Hecatæus above referred to was probably Hecatæus of Abdera, in Thrace, fourth century B.C.; a friend of Alexander the Great. This Hecatæus is said to have written a history of the Hyperboreans: that it was Hecatæus of Miletus, an historian of the sixth century B.C., is less likely. “As to the second point, although we cannot go so far back in evidence of the power and civilisation of the Britons, there is an argument of some value to be drawn from the fine character of the coinage issued by British kings early in the second century B.C., and from the statement of Julius Cæsar (‘De Bello Gallico,’ vi., c. 14) that in the schools of the Druids the subjects taught included the movements of the stars, the size of the earth, and the nature of things (multa præterea de sideribus et eorum motu, de mundi magnitudine, de rerum natura, de deorum immortalium vi ac potestate disputant et juventuti tradunt). “Studies of such a character seem quite consistent with, and to demand, a long antecedent period of civilisation.” Henry of Huntingdon is the first English writer to refer to Stonehenge, which he calls Stanenges. Geoffrey of Monmouth (1138) and Giraldus Cambrensis come next.