Does anyone know a Mr A George?

I live in 17 but have received a card and letter from the UK (post frank unreadable) addressed to Mr A George, St Hilaire du bois, la vendee France

A long shot but does anyone know him?

Since 1975 the commune of St Hilaire du Bois in Vendee has joined with La Caillere and is now known as La Caillere-Sainte-Hilaire with a post code of 85410.
You could try amending the commune name and adding the postcode and popping it back into the post, or alternatively, send it to the Mairie in La Caillere-Sainte-Hilaire who will probably know where exactly to find Mr George.