true historic times that their story can easily be recovered. If this latter view is adopted, the whole, it appears to me, hangs so perfectly together, and presents so complete and so rational an account of all the local or historical facts which are at present known concerning these remains, that I feel great confidence that it must eventually be adopted as the true explanation of the phenomena. If it is it will have this further advantage, that when any serious attempt is made to investigate either the history or the manners and customs of these ancient peoples, it is probable that these megalithic remains will be found to be the best and surest guide.
From the circumstances above detailed, this work would have been a much more meagre production than it is hoped it will be found, had it not been for the kindness of many friends who have assisted me in my undertaking. My chapter on Ireland, for instance, would have been much less full had not Sir W. Wilde, Mr. Eugene Conwell, and Mr. Moore assisted me with illustrations and information; and for my knowledge of Scotch antiquities I owe much to my friend John Stuart, of Edinburgh, while Sir Henry Dryden's invaluable collections have been of the utmost service to me both as regards Scotland and Brittany. Professor Säve and Mr. Hildebrand have materially aided me in Sweden, and M. Riaño in Spain; but the post apparently suppresses any correspondence on archæological subjects with France and Denmark. Without the kindness of Sir Bartle Frere and his elder brother in lending me drawings, or Colonel Collinson in procuring information, my account of the Maltese antiquities would have been very much less satisfactory than it is; and I also owe my best thanks to Mr. Walhouse, of the Madras Civil Service, and Mr. Burgess, of Bombay, for their assistance in respect to Indian antiquities. I have tried in the text to acknowledge my obligations to these and all other parties who have assisted me. If I have omitted any, I trust they will believe it has not been intentionally, but through inadvertence.
