The material in this sub-collection - relating to the collecting, buying and selling of works of art - was found scattered across Sewell's papers and brought together during the process of cataloguing It includes:
-catalogues advertising the sales Sewell organised, or co-organised
-notebooks in which he recorded the details of pictures, bronzes, and furniture he bought and sold
-appointment diaries showing when he visited auction houses, etc
-complete sale catalogues and extracts from sale catalogues which Sewell annotated with the dates and sold prices
-receipts and invoices for works of art and furniture
-correspondence relating to the buying and selling, attribution, and loans of pictures
-insurance valuations of works of art, books, and furniture bought by Sewell
-photographs of works of art