1. Bradley Richard, John C. Barrett, Richard Bradley, Green Martin, Landscape, monuments and society (Cambridge, 1991), 58. The remark refers specifically to the Dorset cursus.
2. Cf. Hawkes Jacquetta, Man and the sun (London, 1962), 168.
3. Aveni Anthony F., Stairways to the stars: Skywatching in three great ancient cultures (New York, 1997), 91, 85.