I find it interesting that there is a Nolan family living on Oak Island. That is my maiden name although we have a different spelling and I have traced my dad’s line back to Henry Sinclair...so it is interesting that Sinclair visiting there is one of the current theories about it...and that a Nolan family lives there.
Ancient Roman documents do say that Roman ships sailed west from what is Spain and never came back—They had ships almost as good as Columbus so it was very possible—Roman ships sailed to China Across Indian Ocean, into Pacific, and to Canton. They even has a suez canal in Egypt. Possible—but—probabal?
Heh... Scott W, who used to have a show on History Channel, spent an episode purporting to search for a trace of Henry Sinclair's slightly precolumbian castle in eastern Canada, on some coast or island not all that far from Oak Island. That was one of his shark-jumpers.