I have just realised that you say Armstrongs were in Sunderland, so my last message is not relevant unless he was in shipbuilding. As Alan said there was Armstrong, Addison & Co. Timber Merchants, offices at 17 North Bridge Street, timber yards at the North Docks, and Northumberland Dock, North Shields. They were established in 1853, and I can remember the timber yards in my youth so if it was the same firm they were there in 1918, and being such a large well established firm could have been known to Wearsiders as Armstrongs. What was his occupation? Regards Stan Mapstone