MacBride thanks Ewart for his paper on the development of the horse, and hopes to read the other parts when they come out. He has been asked by Nature to write the obituary for Arthur Darbishire, and asks Ewart for details concerning his regiment and the circumstances of his death.

Letter is unsigned.

MacBride thanks Ewart for his telegram with the details he needed about Darbishire for his obituary, which he has sent to Nature. He is delighted with Ewart's work on the embryology of the horse, and believes that 'it is only by slow painstaking work of this kind that a real science of Comparative Embryology will ever be built up.' He is glad that Ewart gives no countenance to the 'crook theories' about the layers of the embryo.

The letter is undated.