Note that of the four works recorded in the Sale Inventory here and linked to the c.1639 inventory, one is identified, two are possibly matched and one is unidentified

Note that the work cited here is only a possible match with the record.

"Portrait of Princess Sophia now at Wilton House", 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 

'The young Palsgrave' probably refers to Charles I Louis, Elector Palatine (1617-1680)