Bust of man with large moustache and desk: -pencil sketches on paper -loose -11.2 x 17.8 cm -[on sketch] '578 (initially 588, crossed out) / 571 (initially 582, partially crossed out) / 20 (underlined)'
Man grinding copper ore in Bolivia: -pencil sketch on paper, partially glued to lined paper -loose -6.8 x 12.7 cm (9.5 x 13.4 cm with mount) -[on sketch] 'Grinding Copper ore / in Bolivia - / The stone is called / Quimballeta (underlined) / Indian word (underlined)' (pencil note)
Anatomical studies (ribcage, shoulder and humerus): -inked pencil drawings with ink wash on paper -loose -18.2 x 22.7 cm -[on drawing] 'S. Vertebrae of Neck - / C. Acromiun of Scapula - / H. Clavicle - / R. Sternum - / f. Head of Humerus - / K Humerus' (ink note)
Portraits of Margaret of Austria and Joanna of Castile: -pencil sketches on paper, mounted on card -loose -[left] 7.3 x 10.7 cm, [right] 7.3 x 10.5 cm (21.2 x 14.2 cm with mount) -[on left sketch] 'Marguerita de Austria' (pencil note) -[on right sketch] 'Juana hija de los / Reyes Catolicos' (pencil note)
[Top] Sketches of types of female figures; [middle] caricatures of man and woman; [bottom] caricature of man (perhaps Bonomi himself) by pyramid: -ink and pencil sketches on paper, mounted on blue lined paper -loose -[top] 13.5 x 6.5 cm, [middle (folded)] 5.6 x 6.6 cm / [middle (unfolded)] 5.6 x 13.1 cm, [bottom] 12 x 7 cm (17.4 x 22 cm with mount) -[on top sketch] 'La belle taille ronde' (pencil note) -[on verso of middle sketches] calculations (pencil note)
Portraits of Jacomo de Cachiopin (1575-1642) [upper left], Justus Sustermans (1597-1681) [lower left], Jacques du Broeucq (c. 1505-1584) [upper right], and Paulus Pontius (1603-1658) [lower right] originally by Antoon van Dyck (1599-1641), copied from engravings in Icones Principum Virorum / The Iconography: -pencil drawings on paper, mounted on paper with ink and ink (grey) wash frame -mounted -13.4 x 15.6 cm (22 x 24.7 cm with mount) -[on drawing] '99 / 92 / 73 / 83' (pencil notes) -[on mount] 'J. DE CACHOPIN.' (ink note) -[on mount] 'J. DE BREUK.' (ink note) -[on mount] 'J. SUTTERMANS.' (ink note) -[on mount] 'P. PONTIUS.' (ink note) -[on mount] 'a / 5.-' (pencil note)