Portrait of a gentleman, three-quarter-length, in a ruff collar and black silk doublet with lace-trimmed cuffs, his gloves in his left hand and a hat in his right hand; and Portrait of a lady, three-quarter-length, in a ruff collar and black silk dress with a brocade bodice with gold buttons and lace-trimmed, turn-back cuffs, her white gloves in her left hand

The traditional identification of these portraits as of Grand Pensionary Johann de Witt and his wife must be discounted if only on the grounds of age: de Witt was born in 1625, which would make him only nine years old at the time these portraits were painted. In addition, however, the Grand Pensionary's physiognomy, as recorded in known portraits such as that by Adriaen Hanneman in the Museum Boijmans-Van Beuningen, Rotterdam, differs from that of the present male sitter.

Langley Park, ten miles east of Norwich, was bought by George Proctor (d. 1744) from the Berney family in 1742. Proctor, a connoisseur and collector who had until then lived in Venice, employed the Norwich architect Matthew Brettingham (d. 1769), who was also patronised by the Earl of Leicester at Holkham Hall, to build him a Palladian villa on his new estates. However, Proctor died two years later, and his estates passed to his nephew William Beauchamp, later Sir William Beauchamp-Proctor, 1st Bt. (the family changed their name in 1852 to Proctor-Beauchamp). It was Beauchamp-Proctor who was completed and enlarged the mansion, and who was largely responsible for building up the notable collection of pictures at Langley. The picture collection at Langley included many works now in public collections, including Stubbs's Lion and Lioness (Boston, Museum of Fine Arts), a View of the Molo, Venice (El Paso, Texas, Museum of Art) and a View of the Grand Canal, Venice, from the Campo San Vio by Canaletto (Memphis, Tennessee, Brooks Museum of Art) and Poussin's Adoration of the Shepherds (London, National Gallery).