Cecil thanks Ewart for 'the photo of Mulatto and Romulus' (Ewart's first zebra/horse hybrid and dam) and mentions that the Scottish Farmer should be sending 'Reid of Wishaw' (Charles Reid, the photographer). Cecil suggests that Reid should photograph Ewart's various animals (zebra, mule, donkey as well as Mulatto and Romulus) to highlight the differences in stripes between father and son, and the absence of stripes in the non-hybrid animals.

This photograph likely dates from around the time of The Penycuik Experiments, although the image does not appear in that work. The card mount is marked 'Charles Reid, Gloucester' and bears signs of having been glued to another surface.