Duerst acknowledges receipt of Ewart's paper 'On skulls of horses from the Roman fort at Newstead' and states that he will send Ewart a copy of his own treatise on the animal remains from Anau when he has received it. He proposes that the desert horse from Anau must be the first domestic horse, or else the first desert or oriental horse.

Duerst writes that he has molars from heavy horses but not from Westeregeln or Thiede, and recommends that Ewart contact Professor Dr Hesse. He has studied the skeleton of the Remagen horse only rapidly and believes it is possible that the metatarsel in question may belong to another specimen.

Duerst writes that he would like to read all of Ewart's works as they are both researching similar subjects concerning the horse. He describes his work on the subspecies Equus caballus nehringi and Equus caballus Pumpellii and states that he is sending Ewart all of his own papers and requests that Ewart do the same.