“AIDS”
From Newcastle’s book on horsemanship
He was a professor of a style of horsemanship which went out of fashion in this country long ago, but culminated in France some two hundred years later than the days of Newcastle, under those two great masters of the Haute École, Baucher and Captain Raabe.
It was not only in the pirouetting and demi-volting of horses that Newcastle interested himself. After the Restoration, he went on the Turf; although it is doubtful whether he raced except at Welbeck.[160] Near that place he established a race-course, where he held no less than six meetings in the year, and the races at them were run under special rules of his own making.
[160] Dictionary of National Biography, IX, 368.
Some years earlier (in 1659) he had denied all knowledge of racing—or horse-coursing, as he called it—in a letter to Nicholas (Egerton MSS., British Museum). “It is two professions, a good horseman and a Horse courser. I pretend to the first, but know nothing of the second, for I’ll cozen nobody; I only take care not to be cozened.”