The folliculus was merely a smaller follis, apparently about the same size as a paganica, also a middle sized ball, stuffed with feathers, and therefore harder than the follis, which was only filled with air, but tenderer than the pila, which was probably as hard and heavy as our tennis-ball. Martial mentions all the three principal balls in a couplet — ‘ Hæc quæ difficilli turget Paganica plumâ / Folle minus laxa est et minus arcta pilâ. ’ ¶ ‘ This Paganica stuffed with stiff feathers is of tougher substance than the balloon, but of less compact substance than the tennis ball ’