Lovamo:
Although Lt A. P. MATHESON, aged 22, was the son of Sir Alexander Perceval Matheson, Baronet, and Lady Matheson of Ardarun, Littlehampton, Sussex, England, he apparently emigrated to Canada. I say this because his name is listed in Canada's Books of Remembrance, which are kept in the Peace Tower on Parliament Hill in Ottawa (
http://www.vac-acc.gc.ca/content/col...9&lang=English), and in the Canadian Virtual War Memorial (
http://www.vac-acc.gc.ca/remembers/s...sualty=2959597).
Good luck in your research.
AV8R