Although, and indeed because, these inquiries are still incomplete, I now bring together some of the notes I have collected, as they may induce other inquirers to go on with the work. Some of the results already obtained have been communicated to the Royal Society, and others have appeared in articles published in Nature, but only a small percentage of the monuments available has so far been examined. Further observations are required in order that the hypothesis set forth in this book may be rejected or confirmed.
In the observations made at Stonehenge referred to in [Chapter VII.] I had the inestimable advantage of the collaboration of the late Mr. Penrose. Our work there would not have been possible without the sympathetic assistance of Sir Edmund Antrobus, Bart.; Colonel Duncan A. Johnston, R.E., Director-General of the Ordnance Survey, also was good enough on several occasions to furnish us with much valuable information which is referred to in its place. Messrs. Howard Payn and Fowler skilfully and zealously helped in the observations and computations. To all these I am glad to take this opportunity of expressing my obligations.
With regard to the other monuments besides Stonehenge, I have to tender my thanks to the following gentlemen for most valuable local assistance:—
Brittany—Lieut. de Vaisseau Devoir.
Stenness—Mr. Spence.
Stanton Drew—Professor Lloyd Morgan, Mr. Morrow, and Mr. Dymond.
The Hurlers, and the Merry Maidens—the Right Hon. Viscount Falmouth, Capt. Henderson, Mr. Horton Bolitho and Mr. Wallis.
Tregaseal—Mr. Horton Bolitho and Mr. Thomas.
The Dartmoor Avenues—Mr. Worth.
The following have helped me in many ways, among them with advice and criticism:—Principal Rhys, Dr. Wallis Budge, Dr. J. G. Frazer, and Mr. A. L. Lewis.