View of cliff in Egypt or Sudan:

• pencil sketch on paper
• loose
• 21 x 12.6 cm

Portfolio titled 'Architectural / JB.' (ink)
Pencil notes: 'Architectural / Vol 2 / Complete'.

Architectonic designs (elevations, sections and details):

• pencil and ink sketches on paper
• mounted, together with Bonomi MSS 26.3 (upper)
• 22.9 x 18.7 cm

Knotted or braided column built into the wall in the Temple Mound at Jerusalem in Israel:

• pencil sketch on paper
• originally partially glued (now loose), together with Bonomi MSS 26.5 (lower left and lower right)
• 11.9 x 19 cm
• [on mount] 'Camera sketch / in the Haram / Es sherif Jerusalem / cipolino marble / columns built into / the wall' (pencil note)

Knotted or braided columns built into the wall in the Temple Mound at Jerusalem in Israel:

• pencil sketches on paper
• originally partially glued (now loose), together with Bonomi MSS 26.5 (lower left and lower right)
• 11.9 x 19 cm
• [on mount] 'Camera sketch / in the Haram / Es sherif Jerusalem / cipolino marble / columns built into / the wall' (pencil note)

Knotted or braided design with face, probably of stone column or pillar:

• partially inked pencil sketch on paper
• mounted, together with Bonomi MSS 26.5 (upper and lower left)
• 6.7 x 9.5 cm

Design for a church to be built on the banks of the Nile in Egypt:

• ink and watercolour (brown, blue) sketch on paper
• loose
• 11.3 x 7.8 cm
• [on sketch] 'design for a church / to be built on the / banks of / the Nile' (ink note)

Portfolio titled 'Drawings Various / by JB and other hands.' (ink).

Country house:

• pencil sketch on paper
• loose
• 36.5 x 26.7 cm

Two profile views of male heads:

• ink (purple) sketches on paper, with hole-punch on top right corner
• loose
• 11.3 x 6.2 cm

Bust of man with large moustache and desk:

• pencil sketches on paper
• loose
• 11.2 x 17.8 cm
• [on sketch] '578 (initially 588) / 571 (initially 582) / 20 (underlined)'

Desk crowned with bust of man with large moustache:

• pencil sketch on paper
• loose
• 17.8 x 11.2 cm

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)

Men grinding copper ore in Bolivia:

• pencil sketch on paper, partially glued to lined paper
• loose
• 12.7 x 6.8 cm (13.4 x 9.5 cm with mount)

Diagram with numbers:

• pencil sketch on paper, mounted on lined paper
• loose
• 3.3 x 6.5 cm (9.5 x 13.4 cm with mount)

Man with feathered hat and cloak holding a dagger:

• pencil sketch on paper
• loose
• 12.5 x 20.2 cm

Profile view of male bust:

• pencil sketch with ink (brown) wash on paper
• loose
• 10 x 9.6 cm

Woman in historical dress:

• ink sketch on paper, mounted on blue lined paper
• loose
• 10 x 12.6 cm (17.7 x 22.1 cm with mount)

Two sketches of women by window:

• pencil sketches on paper
• loose
• 22.6 x 17.7 cm

Two overlapping sketches of bearded male heads:

• pencil sketches on paper
• loose
• 13 x 18.7 cm

Classicised male figure, other sketches and notes:

• pencil and ink sketches and pencil notes on paper
• loose
• 13 x 18.7 cm

Three views of horse's head:

• pencil sketches on paper, mounted on pink paper
• loose
• [left] 5.2 x 5.7 cm, [middle] 4.2 x 6.0 cm, [right] 5.1 x 5.7 cm (19 x 6.4 cm with mount)

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)

Medals or coins and other sketches:

• ink sketches on paper
• loose
• 12.6 x 7.2 cm

Medals or coins and other sketches:

• pencil sketches on paper
• loose
• 12.6 x 7.2 cm

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)

Woman holding infant:

• pencil sketch on paper
• loose
• 28.3 x 39.2 cm

Two infant heads:

• prints on paper, mounted on paper
• loose
• [upper] 6.9 x 8.1 cm, [lower] 7.6 x 8.9 cm (13.1 x 25.3 cm with mount)

Four women contemplating a bust:

• ink (blue) sketch on paper
• loose
• 9.9 x 14cm

[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)