Keith Sugden

gle of the narrowest sector are also cited. The dates are based on Ephemeris time, which differs by less than three hours from Universal time during the period considered. Before 1583 the Julian calendar has been used. Values in the fourth and sixth columns have been rounded to the nearest integer....

Avebury and Stonehenge, the two most important prehistoric temples in Britain, are sited quite close together, about 28km apart. Why should this be? Although it may not be immediately apparent, they occupy a central position as far as ancient tracks are concerned. Many ridgeways converge on...