( iii ) 



Professor Cleland interested himself in the reproduc- 

 tion of the three photogravures, two of John Hunter 

 and one of Vesalius. 



I am indebted to Messrs. T. and R. Annan 

 and Sons, Glasgow, for the superb manner in which 

 they have executed these photogravures. The photo- 

 gravure of what I venture to call " The Queen's 

 John Hunter " is magnificent. 



For the loan of prints, blocks, and medallions, 

 I am indebted to my friends Mr. A. E. Shipley, and 

 Dr. J. N. Langley, Professors Charles Richet and 

 E. Gley, of Paris, Professors H. B. Dixon, De Burgh 

 Birch, Sir J. Burdon-Sanderson, G. D. Thane, M. Verworn, 

 Dr. R. Milne Murray, and to Professor Mariano L. 

 Patrizi, of Modena. I have also to thank my friends 

 Professor C. S. Sherrington and Professor A. D. Waller 

 for help. Their contributions bear their initials. My 

 thanks are also due to my old college friend Professor 

 Arthur Thomson, of Oxford, and Mr. Horace Hart, 

 for obtaining for me photographs from prints in the 

 Hope Collection, and also to Mr. Victor G. Plarr 

 for permission to obtain photographs of some of the 

 rare prints in the Library of the Royal College of 

 Surgeons of England. 



For permission to copy certain illustrations 

 I am indebted to A. H. Hallam Murray, Esq., 

 Frank Bowcher, Esq., Sir W. Paget Bowman, Pierre 

 Petit et Fils, Paris (to copy their portrait of 

 Pasteur), Messrs. Mayall & Co., Limited, London, 

 Frau Dr. A. M. Schubart, and to the Hon. John 



