SOVEREIGNS, Mac (Arthur Kaulfuss, 1882?1955). MAC SOVEREIGNS COMBINATIONS OF SPORTING PLAYS. Hamburg: Adolph Friedlander, [1914]. Stone lithograph in colors picturing vignettes from the juggling act of Sovereigns, the self-proclaimed ?king of the diabolo,? sometimes known as the Chinese Yo-Yo. Handsomely framed to 39? ? 30". Old folds and one chip visible; not examined out of frame. An innovator of juggling tricks with the diabolo, Sovereigns devised metal rails along which the spinning top would roll and ride, and as pictured in this poster, surfaces on either side of the stage he could bounce the diabolo on. He also constructed a xylophone-like instrument which could be played during his act with the spinning top.