Correspondence covers such topics as Ewart's research into the Connemara pony and the Przewalski's horse. 1901 was the year in which Przewalski's horses, the only breed of truly wild horses still in existence, began to be exported by Baron von Falz-Fein, who had been trying to capture them for a couple of years previously. The animal dealer Carl Hagenbeck was one of the first to purchase Przewalski's foals from Falz-Fein and he procured some for Ewart. The correspondence also features Colonel Alfred Keene, who was procuring zebra hybrids for military use by the Government of India.