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Robertson writes that he had come to the same conclusion as Ewart that a slender horse played an important part in the ancestry of the English thoroughbred. He has compared various fossilised remains and concluded that although the shaft of the central portion of the large metacarpal bone is broad, the shapes of the first three phalanger are indicative of a slender race. He makes several observations on the significance of the metacarpals.

Gregory writes that the lower jaw of a horse has been discovered in the upper drifts filling the pre-glacial valley of the Clyde at Lanark. He suspects that it dates from around the Early Neolithic period. He asks Ewart to look at the specimen and write a short note on it for inclusion in the Hunterian Museum glacial vertebrate fossils.

Gregory writes that he has provisionally inserted the bed in a tabular classification as Neolithic. He believes it must be post-glacial, as it represents the silting up of valleys which were excavated at the end of glacial times, but the horse jaw is the only fossil evidence of this.

Blunt replies to Ewart's acceptance of the gift of a filly. He encloses details of the filly's breeding. He also enquires in what published work he could find details of the fossil of the horse as originally traced by Huxley and Marsh, as he is hoping to begin a genealogy of the Arabian horse.

Image of the skeleton of the fossil "Desert Horse" which was discovered through the Whitney Fund in [1906] and is mounted in the American Museum of Natural History, New York, NY, USA.