I finally found the death of James Howat b. abt. 1813 in Kirkmahoe, Dumfriesshire, m. 1834 in Troqueer, Kirkcudbrightshire to Helen Clark b. abt 1815 in Holywood, d. 1894 in Hurlford, Ayrshire.  She was the dau. of John Clark, ironmonger.   I found this entry under the spelling of Houat, but it was clearly Howat on the certificate.   1867 Deaths in the Parish of Fenwick in the County of Ayr, page 9, No. 25 James Howat (gamekeeper) married to Helen Clark d. 1867, December twentieth, 11h 20m P.M. at Townhead male, ae 53 years son of William Howat, gamekeeper (deceased) & Jean Howat, m.s. Maxwell (deceased) d. of consumption, of several years, No regular medical attendant Informant:  Helen Howat, wife Registered:  1867, December 24, at Fenwick, John Gammit, Registrar