It's not as evident as the "Sir Isumbras" one, but there are lots of similar details, like despatches, h/c, hand holding, m/m vibes, swooning, tragic events... and Jacobites, of course!

Each man kills the thing he loves, indeed.

(Preserving a friend's life by suggesting that he might give up information against his cause is present in both stories, too, although it's not played for angst in this one.)