Traité historique du chef de S. Jean Baptiste
A 1665 Paris historical treatise on the relic of Saint John the Baptist's head, written by Charles Du Fresne, sieur Du Cange, for scholars and churchmen. Its four ornamental headpieces show decorative engravings: a central mask flanked by foliage and flower swags, a garland of fruit and cherubic head, two cherubs embracing above a fruit cluster, and a stylised acanthus-and-blossom urn with a grotesque mask; a designer could draw on their symmetrical garlands, swags and scrolled foliage for borders and ornament.
