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 D have four horizontal lines in the hat itself, level tassel balls, and two knots on the top of the hat, and are relatively wider and squatter than Groups A, B, and C.

Briquet Comparison: B 3391.^[1]

Found in folios: Arundel ff. 5-10 and Arundel ff. 20-28.

Potential Twins: Cardinal’s Hat – Group C (Arundel ff. 1-14, 3-12, 7-8, 22-23, f. 26, and f. 30)

[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).