PREFACE 



to thank not only for permission to reproduce 



illustrations from their works, but also for their 



kind interest in my volume. Figure 19 I owe to 



my friend Dr. Randall Maclver. The frontispiece 



and Plate I are fine photographs by Messrs. The 



Graphotone Co., Ltd. 



In conclusion, I must not forget to thank 



Canon F. F. Grensted for much help with regard 



to the astronomical problems connected with 



Stonehenge. 



T. Eric' Peet. 



Liverpool, 



August 10th, 1912. 



IX 



