In writing this history of Scotland's Clan Gregor, Forbes Macgregor delved into the distant past to explore the significance of the clan's Gaelic motto: 'S Rìoghail mo Dhrèam (My Lineage is Royal). His book describes the clan's role in major historical events in Scotland, leading up to the 'proscription' of the clan and the banning of the MacGregor surname. The facts behind the remarkable legend of Rob Roy are brought forward, as are Clan Gregor's contributions in more recent history, both in and furth of Scotland.
His intention was to make 'a shorter version which is not so condensed as to be a mere catalogue, but which is enlivened by incidents from picturesque MacGregor history, or tradition, and by my own comments, guided by a respect for Truth and an irreverence for Caesar, all set in the long historical framework of the Christian era.'
Forbes Macgregor was born in Edinburgh in 1904. He was educated in the city and in 1937 gained an Honours BA at London University by private study. During the 1920s he was a scoutmaster in the Canongate, taking troops of boys hiking and camping all over Scotland.
In 1924 he started a teaching career which lasted for forty-one years and ended in 1965 when he retired as Headmaster of South Morningside Primary School.
He was the author of numerous books, including Greyfriars Bobby: The Real Story at Last, Scots Proverbs and Rhymes, Famous Scots, Macgregor's Mixture and More Macgregor's Mixture.
Forbes Macgregor died in 1991.