to when painting portraits of the members of his family. These personal paintings would have stayed in the possession of the family and been proudly displayed at home. Provenance This drawing was in the possession of various collectors, of which five are known, prior to its acquisition by the British Museum. Their identities are revealed by the collector marks found on the recto (front) and verso (back) side of the portrait. The collector marks are identified by Lugt numbers, a cataloguing system created by Fritz Lugt (1884–1970). There are three marks on the recto side located on the bottom right of the portrait. They have been linked to three collectors Prosper Henry Lankrink, Jonathan Richardson Senior and George John Spencer, 2nd Earl Spencer. The verso side has one mark on the top and bottom right corners. The top mark is linked to Robert Stayner Holford and the bottom is the British Museum acquisition stamp. Prosper Henry Lankrink The collector mark for Prosper Henry Lankrink (1628–1692) is identified by "PHL" (Lugt. 2090) with the H and L conjoined. Lankrink was a painter who trained in the Netherlands before moving to England. He was employed as an assistant by Peter Lely (Pieter Van der Faes) (1618–1680), the leading portraitist to the court of Charles II. Lankrink was influenced by Lely's superb collection of drawings, paintings and prints. After Lely's death in 1680, Lankrink had the opportunity to purchase part of his art collection, including the Flemish drawings by Rubens and van Dyck, in a sale of assets in 1682 and 1688. Lankrink was popular at court and in high society. His increasingly debauched lifestyle was the cause of his growing debt. When Lankrink died in 1692, his assets were sold to pay off his creditors. The sale of Lankrink's assets was announced in 1693: Amongst the items catalogued, one of the three items (Nos. 220 and 223) described as "An Head, by Rubens" and (No. 316) "A Woman's Head, by Rubens", could have been the drawing of Isabella Brant. Sir James Thornhill There is no collector mark for Sir James Thornhill (1675 or 1676–1734) found on the drawing. James Thornhill was a painter of the Italianate baroque style. He was identified through an inscribed text on an attached piece of paper ( is now lost due to re-mounting in 1964) on the verso side of the drawing. The initials JR was misread