The Phillips of Hitchin archive contains stock books, sales ledgers and invoices relating to the acquisition and sale of antiques and artworks. These include prices and values of antiques and artworks and in some cases details of any restoration and provenance information.
The archive includes extensive correspondence with clients.
There are many photographs of the company's stock mainly in black and white. Many of these were loose. Some were originally stored in albums. A considerable number of these date from the early twentieth century and also the 1950s and 1960s.
The collection includes photographs of Bailiffscourt in Sussex, the manor house which Phillips designed, had constructed and furnished for Lord Moyne.
There are some promotional materials in the archive particularly relating to Antiques' Fairs.
The archive contains a few technical drawings and some artwork.