Sir John Harpur’s Barb Owned in Derbyshire by Sir John Harpur (1679-1741) and probably by Sir Henry Harpur (1709-1748), 5th Bt, since the General Stud Book is inconsistent on both the breeding of Rattle and the ownership of his sire. It says both Rattle, by a son of Sir H Harpur's Barb - Royal Mare [GSB 1:382], and in the pedigree of Silvertail Rattle (son of Sir J Harpur's Barb) [GSB 1:183]. Young Child Mare is also said to be sired by Sir John Harpur's Barb. In the pedigree of the Stanhope Mare it says out of Mr Burdett's Young Child Mare by Sir J Harpur's Barb [GSB 1:200]. However, Young Child Mare was sired by Burdett's Arabian, who may have been the same horse as Harpur's Barb.