Balding provides detailed notes on various points arising in Ewart's book The Penycuik Experiments, based on his own experience of animal breeding. The main points he discusses are: delicacy from inbreeding, science in breeding and reversion and infection in telegony. He also provides some information concerning the provenance of the term 'quagga' and observations on white colouration in breeding.

Renshaw explains that he is gathering information for a small book on the quagga and is enquiring whether Ewart knows of any quagga hybrids nurtured in captivity and of any stuffed hybrids in preservation.

Renshaw writes that he is sending Ewart prints of two hybrids in the Jardin des Plantes in Amsterdam. He adds that he was not able to find the quagga-hemionus hybrid for him that he had hoped to photograph.

Stewart supplies the address of Mr Grant from South Africa (staying temporarily in Scotland) who could give him details of the African quagga.

Ridgeway states that it is most probable that the Libyan horse in a wild state had more strongly defined stripes than when domesticated and refers to Azara's example of wild and tame cattle in South America differing in colours. He writes that if Ewart agrees he will insert this into the revised last chapter of his book. He has heard that Pocock is going to publish the bay quagga as a new variety or species and asks Ewart to send him an illustrative block of the Hebridean stallion.

Ridgeway congratulates Ewart on the announcement of his marriage. He reports that he has finally got a photograph of the Somali wild ass in Regent's Park from Dando. He mentions forthcoming papers about quaggas from Pocock and Lydekker and concludes by enquiring whether the quagga's markings and its bay colour are to be attributed to its living under the same climactic conditions as the Libyan horse.