Vili PREFACE. 
was, as agreed between us, to be the synonymy and scientific descriptions, 
and my speciality the preparation of the ordinary letterpress. I must also 
not omit to mention that as regards the much-vexed subject of Zoological 
Nomenclature my friend and I are not in perfect accord, as he takes a more 
severe view of the rule of priority than I am disposed to adopt. There has, 
therefore, been necessarily a little ‘‘ give and take” on each side as to the names 
to be adopted in this work. For these latter, in so far as they may be held 
to contravene the strict laws of nomenclature, Thomas desires to disclaim— 
as I am willing to accept—all responsibility. It should also be mentioned 
that during the issue of the last volume Thomas’s somewhat serious illness 
and consequent absence from his post in London has compelled him to 
relegate some of his share in the present work to Mr. R. I. Pocock, of 
the British Museum, who, I need hardly say, has most efficiently assisted 
me in finishing the task and to whom I hereby tender my most sincere 
thanks. 
I must also not forget to record the names of other friends and corre- 
spondents who have materially assisted us in the preparation of the ‘ Book of 
Antelopes. Amongst these I must specially mention Herr Matschie, of the 
Natural History Museum of Berlin, who has kindly furnished many notes on 
the collection of Mammals under his charge in that Institution; nor must I 
forget the names of Mr. F. C. Selous, Herr Oscar Neumann, Mr. S. L. Hinde, 
Mr. F. V. Kirby, Capt. H, G. C. Swayne, Mr. Ernest Gedge, Sir Harry 
Johnston, K.0.B., Mr. R. Crawshay, Mr. Alfred Sharpe, Sir John Kirk, 
Mr. I. E. Blaauw, Mr. F. J, Jackson, Major F. C. Trollope, Dr. E. Biichner, 
Mr. E. Buxton, Mr. J. I. 8. Whitaker, Sir Edmund Loder, Mr. A. E. Pease, 
Mr. Lort Phillips, Mr, T. W. H. Clarke, Mr. J. ffolliott Darling, Mr. John 
Millais, Mr. W. E. de Winton, and my son Mr. W. L. Sclater, Director of 
the South African Museum, Capetown, to all of whom, on behalf of Thomas 
and myself, I wish to tender our most heartfelt thanks for their kind 
assistance. 
