I believe this is the same Jack Jeffares who owned The Old House in Hitcham, Nr. Ipswich, Suffolk, England. We were the American family who rented the house from about 1973-76. I was a young child but I remember he was a pilot who roamed the world. You may have more recent information on Mr.Jeffares, but if not, the current owner of The Old House might be a place to start. I also Googled Jack Jeffares, and found a golf club member on a website for Alaqua Lakes Golf Club in Florida. Might that be him? Good luck.