The Shepherd of Ettrick Vale

The Shepherd of Ettrick Vale is the name given to a performance

One would assume that the title is most probably a reference to the Scottish poet, novelist and essayist James Hogg (1770–1835)[1], known as "The Ettrick Shepherd" of "The Shepherd of Ettrick Vale". However, no play by this bname can be traced.

The performance thus may have either been a reading of the poems and/or stories of "The Ettrick Shepherd", or it was a performance of a play called The Rose of Ettrick Vale, which was popular among the British militia in the Cape Colony in the 1860s.

https://en.wikipedia.org/wiki/James_Hogg

Charles Rogers. 1809. Ettrick Forest, the Ettrick Shepherd, and his monument. John Menzies, Ediburgh [2]

Edinburgh Dramatic Review, Volumes 3-5[3]