Sharp even seems to have believed that he could distinguish 'Celt' from 'Anglo Saxon' within Somerset by their accent, and that the two had different musical predilections. (see page 29). He is quite explicit about drawing on evolutionary theory here.

He distinguishes parts of Somerset and links differences he thinks he has found in music to differences he thinks exist on terms of Celt or Anglo Saxon. However, he has the grace to comment that this is highly speculative.