They first took interest in Prince Edmund because he made it so close to the throne. Aziraphale thought him rather a decent sort, really, though an idiot, and claimed him as a victory at the end.

"He got his entire family killed!" Crowley argued, "I've got him free and clear!"

“Peter has agreed that we can claim him because his repentance brought about his death.”

Though the Blackadder descendants soon ceased to have an influence on the fortunes of England, they remained a favorite battleground, and Crowley took the most smug delight in apologizing for giving The Ghost bad directions.