Mr Prior suggests that Bay Peg was sired by Young Spanker, rather than Leedes Arabian. His evidence is drawn from the account book of John Hervey, "1705, Sept 3rd Paid Mr Anthony Leeds, of Milford, Yorkshire, for ye 3 year old bey Philley (gott by Careless, under Leeds' full sister) and ye 2 year old bey colt (got by ye brown Barbe King William gave his father, under bey Peg, which was a daughter of Young Spanker) and for ye bey yearling gott by Careless, under a daughter of ye said Barbe's, which was one of my Lord Wharton's Gallant's sister, in all £150" [Early Records:150]. However, this bay Peg is not said to have been dam of anything, and is possibly just another mare named Peg, whose colour was bay.