Miss Julia MacDonald1830 · Mezzotint on ivory wove paperImage: 23.1 × 19.2 cm (9 1/8 × 7 9/16 in.); Sheet: 51.4 × 42 cm (20 1/4 × 16 9/16 in.)Art Institute of Chicago
To His Grace the Duke of Somerset this portrait of Michael Faraday Esqr. F.R.S., M.R.I., F.G.S., Cor. Mem. Royal Acad. Sciences Paris, &c. &c. is by permission dedicated by His Graces most humble & obliged Servants Colnaghi, Son & Co1830
Colonel Impitt1800 · Graphite on cream wove card25.7 × 19.3 cm (10 1/8 × 7 5/8 in.)Art Institute of Chicago