d. 1725 Sir Robert, great-grandson himself of an illegitimate daughter of James IV, King of Scots, married Isabel Mackintosh, a descendant of Joan Beaufort, Queen of Scots, and Edward III of England . A great-nephew of Isabel, Col. Henry Mackintosh or McIntosh, immigrated to Boston and Bristol , Rhode Island . His daughter Elizabeth married her immigrant cousin, Lachlan Mackintosh (or McIntosh), a great-nephew of Henry, and their daughter. Elizabeth married the loyalist Isaac Royall, Jr., of Medford , Mass. , whose home is now a national landmark and major tourist attraction. Isaac and his wife later fled to Halifax , their daughter Elizabeth Royall married Sir William Pepperell (formerly Sparhawk), 1st Bt., grandson of the hero of Louisburg , and among their British great-grandsons was the antiquarian Edward Walford.