We knew that by the mid-60s, the late 70s, the late 80s, and at the turn of the millennium. We knew it every Cup day for over five decades, as we scanned the field looking for Bart's runner to place our once-a-year flutter. We knew it in 2008 when Viewed, a 40-1 outsider, won Bart his 12th Melbourne Cup to the surprise of precisely no one, some 50 years after he'd saddled his first runner in the great race.
Just as we knew it yesterday when his son Anthony took to Twitter to tell the world his father had gone. I say "we" with confidence, because Bart was the Australian turf's last surviving national figure, its last household name.