NEWMARKET, UK--"If we don't believe in our stallions, who will?" So said breeder and consignor Ed Harper after topping the second day of foal trade at Tattersalls, though in the case of lot 793, the sire in question, this season's leading freshman Havana Grey (GB), has already garnered the support of plenty of breeders and buyers. But to justify the day's top price tag of 250,000gns at this stage of his young life, the colt had to have plenty more going for him, and his half-brother Dragon Symbol (GB) (Cable...