I'm writing a novel with almost the identical title to your book. Mine is 'This Son of York'. I hope you won't feel aggrieved! It's an alternative history: what if Richard III won at Bosworth and how would his reign have turned out? There'll be two books. The title of the second: 'In a Foreign Field'. Progress is slow because the day job (I'm a publisher's editor) gets in the way. I've put your book 'down to read'.