Even in the heyday of the great owner-breeders, it would have been remarkable for a Classic winner to represent the seventh generation of a single program. In the commercial era, it is beyond extraordinary. Yet in the long, tenuous line linking GI Preakness S. winner National Treasure (Quality Road) to his foundation mare Mono, only once did Peter Blum come close to letting it break. That was when a Mt. Livermore filly named Proposal was sold as a 2-year-old at Keeneland in 1999, for $375,000. "I sold her to John...