vi Preface. 



which can never be filled, and which will be more 

 vividly realized every day by those who had the 

 privilege of his friendship." 



My warmest thanks are due to Professor Newton, 

 of Cambridge, and to Mr. H. Evans, of Jura, who first 

 suggested the idea of a memoir of their old friend, 

 for their help, and for the unflagging interest they 

 have taken in its preparation. 



To the Editors of the Irish Naturalist I would 

 offer my grateful acknowledgments for the repro- 

 duction of the portrait which illustrates this Memoir; 

 to the Linnean Society, the Royal Irish Academy, 

 the Botanical Society of Edinburgh, and the Editors 

 and Proprietors of The Ibis, The Zoologist, The Journal 

 of Botany, The Irish Naturalist, Stanford's New Guide 

 to the Isle of Wight, Guy's Pictorial Guide to the South 

 of Ireland, &c. &c., for permitting the re-publication 

 of some of the most interesting of my Brother's 

 papers ; to the Science and Art Department, for 

 very kind permission to reprint theZw/ of Irish Birds, 

 now in use at the Museum in Dublin ; and to Mr. 

 R. M. Barrington, Professor F. Darwin, the late Sir 

 Edward Newton, Sir John Dillon, Bart., Mr. R. J. 

 Ussher, Mr. Robert Warren, Mr. J. E. Harting, 

 Mrs. Babington, Mrs. Joyce, Mr. G. E. H. Barrett- 

 Hamilton, Dr. R. F. Scharff, Mr. N. Colgan, Mr. 

 W. F. Kirby, Mr. J. A. Harvie-Brown, Mr. Arthur 

 Bennett, Mr. S. A. Stewart, Mr. J. R. Sheridan, 



