"She has played her part," says Pierre Gasnier with some understatement as a gaggle of visitors to the Aga Khan Studs gazes at Zarkava, now enjoying her retirement at the age of 20. With Thoroughbreds, it is the race records that separate the great from the good from the downright ordinary. Zarkava's stands her apart from the crowd by some wide margin. Seven wins, seven runs, with her parting gift on the track to her owner-breeder being her sensational Arc victory. Seventeen years have rolled on since then, and the...