13 letters from J. J. Janssen, 4 carbon copies of letters from Černý to J. J. Janssen.
Janssen's research, and co-operation with Černý:

• plans for his book on commodity prices - Janssen, J. J., Commodity Prices from the Ramessid Period. An Economic Study of the Village of Necropolis Workmen at Thebes (1975) (OEB 9846)
• Janssen's publication of BM EA 588 (TopBib i2.721), published later as Janssen, J. J., 'An unusual donation stela', in Journal of Egyptian Archaeology 49 (1963), 64-70 (OEB 10084)
• discussion of Endesfelder, E., 'Über die Arbeiter der thebanischen Nekropole im Neuen Reich', in Günther, R. and Schrot, G. (eds), Sozialökonomische Verhältnisse im Alten Orient und im klassischen Altertum (1961), 88-93 (OEB 8360)
• Janssen's work on p. Leiden I, 350
• dating of ostraca, and changes in the Deir el-Medîna economy
• Černý mediating access to the Museo Egizio in Turin for Janssen, via Ernesto Scamuzzi
• exchange of off-prints and other publications