Henderson writes that the 'old breed [of sheep] at Duncansbay Head' mentioned by Keith-Murray may possibly be descendants of an old native breed, and provides information about the year-old lamb born to one of his Shetland ewes.

In the letter to Henderson, dated 22 April 1911, Keith-Murray writes that he will glady give Ewart information on the horned sheep at Barrogill. He states that the four-horned ram came from Shetland while the sheep were from St Kilda and Duncansbay Head.