Bill Bryson notes "poorly" & "right good" as Americanisms taken from Northern English dialects.
"Right good" in the form "reet good" is indeed definitively Yorkshire.
Bryson also reminds his readers that some of the Mayflower's passengers hailed from Yorkshire.
He also mentions that slightly further North in what is now County Durham you will find the towns of Washington & Franklin.
The ancestral homes of George Washington & Benjamin Franklin.