Hi Margaret, First, I do not have a book, I was asking about Jack Storey's info he posted.
Now to discuss Strongbow.. If you put his name in google you come up with some good websites on the history around Strongbow. Try: http://www.castlewales.com/strngbow.htmlhttp://www.castlewales.com/strngbow.htmlHere King Henry I is assoicated with Strongbow.... King Henry I reigned 1100-1135.
King William who fought in the Battle of the Boyne was William III he reigned 1689 - 1702 Battle of the Boyne was in 1690, Ireland. To read on William III or William of Orange see: http://www.britannia.com/history/monarchs/mon51.htmlhttp://www.britannia.com/history/monarchs/mon51.html
So thank you for the try, but no Strongbow was not in William's Army.