Utiliser "retentiveness" dans une phrase

1. He knew some anecdotes about the heroes of the turf, and various clever tricks of Marquesses and Viscounts which seemed to prove that blood asserted its pre-eminence even among blacklegs; but the minute retentiveness of his memory was chiefly shown about the horses he had himself bought and sold; the number of miles they would trot you in no time without turning a hair being, after the lapse of years, still a subject of passionate asseveration, in which he would assist the imagination of his hearers by solemnly swearing that they never saw anything like it