Comprises:

correspondence with British & Benington's Ltd., London, tea importers, concerning the packing of tea for African markets and the brand 'Effendi', 1921 'Hehn, N[icolas] de', correspondence with de Hehn, businessman, Paris, 1921-1936. Mainly in French.

'Stirrer', relating to the invention by Joelson of a clockwork pan stirrer, 1922-1923

correspondence and papers relating to business interests, 1918-1956