Research Notes:
"Henry D'Oyly, Lord of Gnowshall and Couley, co. Staff., died s.p. very aged about 1377. He used one stag's head." Henry married "Isabel, dau. of ... living 1377." [1]
[1] John Gough Nichols, ed., The Topographer and Genealogist, Vol. 1 (London: John Bowyer Nichols and Son, 1846), 371, [HathiTrust].