Weekend Trivia Challenge for 3/29/2019

This hulking horse inherited much of his noted sire's stamina but little of the class of either sire or dam and was exported from his native England for a pittance when he could not attract sufficient mares even at the paltry fee of 9 pounds. In exile, his blue-blooded pedigree apparently came to the fore, for he became an important sire in three countries' bloodlines. Name him.