""After almost two years of research he said he was shocked by the answer.
"I was absolutely staggered when I reached the total. I like to think I have a
relatively good general knowledge. But there are places where it hadn't occurred
to me that these things had ever happened. It shocked me. "Other countries could write similar books – but they would be much
shorter. I don't think anyone could match this, although the Americans had a
later start and have been working hard on it in the twentieth century."..He believes the actual figure may well be higher and is inviting the public
to get in touch to provide evidence of other invasions."" (thanks Nu`man)