Papers relating mainly to the business of Jacob Hagen & Sons, including:
- Accounts, 1716-1801
- Letter-book of Jacob Hagen II, 1743-61
- Diaries of Jacob Hagen II, 1752, 1780-90
- Account book of Jacob Hagen II for domestic expenses, 1785-8
- Copies of letters relating to the affairs of the Pennsylvania Land Company, London, 1723-42
- Copies of deeds and papers relating to the Echunga Estate, South Australia, 1840-53
- Notes relating to commodities in South Australia, ca. 1841-2
- Miscellaneous papers and letters of the Hagen family, 1740-1843
- Memento 'printed upon the ice, on the River Thames', 14 February 1740, with the name 'Jacob Hagen, Jun.'