Did I catch a mistake in War Lord?

Hello Mr. Cornwell,

I do not mean to nitpick and I could be mistaken however if I am not wrong then I believe you used a character in Warlord that had actually died in Sword of Kings! Folcbald was said to have been killed in the fight and the Crepelgate in London but yet he is mentioned at the Battle of Brunanburh as fighting alongside Uhtred and his men! This is the only mention of him in the book and he has no dialogue. I hope I am not inconsiderate in saying that I hope I caught a slip as that would be rather exciting for me and rather insignificant for you and your team.

Your books are my favorite,

William Moore