Mark Carroll was for over 30 years a biochemistry lecturer at one of London's premier medical schools. He was introduced to family history by his sister in 2002. His first major project was to research his mother's maiden name, Orriss. Little did he know that it would not be so easy, despite the apparently rare surname. He also did not realise that he would come up against the genealogist's worst nightmare: a Smith family from London In spite...