"Now at Wilton", annotation added by Horace Walpole to the corresponding entry in his copy of George Vertue, Catalogue and Description of King Charles I's Capital Collection.. (1757) in the Surveyor's office, St James's Palace 

Note that the match with the Sale inventory record is only a possible one. There are several perspectives by or after Steenwyck in the Royal Collection today. See also van der Doort WS 87, no 57