Some years have passed since you posted the item but if you have not had any further success in tracing Isaac Jamieson, I hope the following helps.
He was born at 4 King Street, Nairn on 16 March 1895 to John Jamieson & Isabella Ralph and had siblings John, Alexander, Isabella & Mary.
In the 1911 Census he is a fisherman and in 1914 was a seaman in the Royal Naval Reserve.
In 1918 he was in the Royal Navy on the S.S. Ravenscraig at Littlehampton and he married Maud Gliddon in that year in that place.
He settled in Liverpool and worked as a seaman, bricklayer and a lay preacher.
Isaac and Maud had three children, John James, Kenneth Gliddon & Fred A.
Isaac died in Liverpool in 1978.