TWO ESSAYS: 



ONE 



UPON SINGLE VISION WITH TWO EYES; 



THE OTHER 



ON DEW. 

 A LETTER 



TO THE 



RIGHT HON. LLOYD, LORD KENYON 



AND 



AN ACCOUNT 



OF 



A FEMALE OF THE WHITE RACE OF MANKIND, 

 PART OF WHOSE SKIN RESEMBLES THAT OF A NEGRO; 



WITH 



. SOME OBSERVATIONS ON THE CAUSES OF THE DIFFERENCES IN 

 COLOUR AND FORM BETWEEN THE WHITE AND NEGRO 

 RACES OF MEN. 



BY THE LATE WILLIAM CHARLES WELLS, 



M.D. F.B.S. L. & E. 



WITH 



A MEMOIR OF HIS LIFE, 



WRITTEN BY HIMSELF. 



LONDON : 



PRINTED FOR ARCHIBALD CONSTABLE AND CO. EDINBURGH, 



LONGMAN, HURST, REES, ORME, AND BROWN, 

 AND HURST, ROBINSON, AND CO. LONDON. 



1818. 



