I think you're right. Removing that single ref is probably the simplest and cleanest way to remove the confusion. And, if you're in a clean up mood, you might look at The Ferguson Rifle. Ronan makes a comment that an ancestor of his had been on the East Coast as early as 1602. Based on your dad having Tatton leave for America shortly after the Battle of Ivry which was in 1590, I'd say Ronan is about 12 years late in saying 1600. I know we shouldn't try to hold your dad to an exacting treatment of history, but, I'm just saying it's food for thought.

Justintime