Correspondence chiefly concerns Ewart's ongoing research into the origins of the horse and the continuation of zebra breeding in India and Africa. Ewart's involvement with aspects of the Congested Districts Board and Crofters' Commission also features. There is frequent correspondence with Matthew Horace Hayes and Sir William Ridgeway about their books and findings (including Ridgeway's discussion of the 'Crannog skulls' discovery in County Galway), and with F.H.A Marshall about Ewart's proposed farm and research station in Edinburgh.