Dear Sir,

I beg to acknoledge receipt of your esteamed favor of August 28. and am very sorry to learn of it your indisposition and sincerely hope, you are now quite restored.¹

Meantimes I had the pleasure to receive from you the book by Mr Wright on Mr. Mivart’s “Genesis of Species” and present to you my best thanks for this new prove of your benevolence.²

Today I am glad to send you some new additions to my list,³ most of which I took from a work by Prof. Seidlitz at Dorpat “Die Darwin’sche Theorie”, which contains a list of books and papers published on your theory. At the end of this book there is a “Tabellarische Uebersicht der Descendenztheorie”, which seems to me very good.⁴ Specimens of it were distributed at the “Versammlung deutscher Naturforscher” at Rostock to the members of the zoological and botanical sections.⁵

I do not know whether it is of interest to you to hear particulars about observations made on the chimpansee by the keeper and other persons in our Zoological garden at Hamburg.⁶ We keep two of these anthropomorphs, one of which is suffering by phthisis pulmonum⁷ and is lying in a melancholy state in the straw of his cage. One day the ill one got a bread, which soon the other healthy and well disposed animal took from the hands of its companion and ran away with it to the other side of the cage. The ill animal wept bitterly and blew its face with its hands, till the other came back and was breaking the bread into two halfs and returned one. When the ill monkey is coughing, the other one puts its hands on its shoulders and regards it with sympathizing looks.⁸

Any further bibliographical news will follow as soon as I shall have collected them. Believe me, Dear Sir, | your very obedient servant | J W Spengel. | stud. med.