From J. E. Gray   3 April 1871

My Dear Darwin

I think I recollect having made a mistake in my letter to you yesterday.¹ I quoted “Isis” 1813 it ought to be 1831 & Wagler thought it was the female had the yellow dorsal spot.²

Buffon called the male sloth L’ai adult. vol xiii to vi & Daubenton too in his description calls it Ai de dos brulé vol xiii p 62.³ He says it has the appearance as if the hair of the back had been burnt

I have sent you on an American pamphlet I have received today⁴

Yours sincerely | J E Gray