Anonymous sale, London, Christie's, 16 March 1923, lot 64 (as by Pompeo Batoni).

This very large canvas has been relined. Overall for a work of this size it is in good condition. There is a canvas seam running across the work horizontally through the mothers chest. Some isolated discolored retoches are visible in scattered parts of the composition, namely in the child's dress. The varnish within the mothers blue fabric has blanched somewhat. With an adjustment of older retouches and new varnish the painting could be hung in its current state. In a carved wood frame.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective qualified opinion.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.

The sitters are Elizabeth Beckford, née Ashley, wife of Julines Beckford (1717?-1764) of Stepleton, Iwerne, Dorset, and her son Peter (1740-1811).  The Beckford family’s wealth derived from plantations they owned in Jamaica.  Peter Beckford’s Grand Tour as a young man through France, Switzerland and Italy is well documented in published letters.¹  His full-length portrait (oil on canvas, 94 by 64 in.), now in the Statens Museum for Kunst, Copenhagen, was painted by Pompeo Batoni in 1766.

1.  Letters and Observations written on a Short Tour through France and Italy by a Gentleman, Salisbury 1786; Familiar Letters from Italy to a Friend in England, London 1805.