His sons were executed for march-treason, or border-theft, along with the lairds of Corbet, Greenhead, and Overton, A.D. 1588.-Johnston's History, p.
"Minstrelsy of the Scottish border (3rd ed) (1 of 3)"
Walter Scott
There is the slope of the hillside, black against the night sky, and among the trees I see the glimmer of a light beckoning me as the lonely lamp in Greenhead Ghyll used to beckon Wordsworth's Michael.
"Pebbles on the Shore"
Alpha of the Plough (Alfred George Gardiner)
Coming from the neighbourhood of Bewcastle Fells, it enters Northumberland at Gilsland, and leading eastward as far as Magna, then turns directly southward past Greenhead.
"Northumberland Yesterday and To-day"
Jean F. Terry