The Rev David John Silian JONES (29 I 1901 - 26 III 1957) was Rector of Erbistock, 1934-44, Rector of Overton, 1944-47, and Rector of Overton and Erbistock, 1947-57. His wife, Bertha Margaret ALCOCK, appears to have been born on 12 March 1907, and to have died, aged 89, in 1996 (see Scotland's People).
Per Free BMD, the birth of John Farley ELFORD was registered in Q1 1873 in St Thomas, Devon. His marriage to Ethel Fitzmayer STEPHEN took place in 1909 (registered Q3 - St George Hanover Square). The death, at the age of 86, of a John F ELFORD, which I take to be him, was registered in Stafford in Q1 1959. Per Scotland's People, his wife died in 1950, aged 81 (ref 059/A6 - Avoch), and their daughter, Mrs Lilian SHAW OF TORDARROCH, was 78 when she died in 1989 (ref 196/59 - Dingwall).