Description: A wide-brimmed hat seen from the front, with two strings that are tied below and then separate, terminating in round (tassel) balls.

Description of difference: Hats in Group A have four horizontal lines in the hat itself and are distinguished by non-level and differently sized tassel balls, in contrast to the relatively level tassel balls of Groups B, C, and D.

Briquet Comparisons: B 3391, B 3367.^[1]

Found in folios: Leicester Sheet 9, Leicester Sheet 10, Leicester Sheet 11, Leicester Sheet 12, Leicester Sheet 13, Leicester Sheet 16, and Arundel ff. 208-209.

Potential Twins: Cardinal’s Hat – Group B (Leicester Sheet 14, Sheet 15, Sheet 17, and Sheet 18)

[1] Because similarities to Briquet’s watermarks continue to be included in the literature, they have been cited here. Briquet comparisons were extracted from Carlo Pedretti and Carlo Vecce in “Apparati IV, V, Filigrane,” Il Codice Arundel 263 nella British Library: edizione in facsimile nel riordinamento cronologico dei suoi fascicoli (Florence: Giunti, 1998), 58-61; Carlo Pedretti, The Codex Hammer of Leonardo da Vinci, translated into English and annotated by Carlo Pedretti (Florence: Giunti Barbèra, 1987); Carmen C. Bambach in Leonardo da Vinci Rediscovered, 4 vols. (New Haven and London: Yale University Press, 2019); and Juliana Barone, ed., Leonardo da Vinci: A Mind in Motion, exh. cat. (London: The British Library, 2019).