Yesterday, I came across Ong's copy of A Literary and Historical Atlas of Europe. In it, he has marked the routes he took for the following trips:

• Europe: July 26-Aug 26, 1929


• Europe: March 21, 1950-Nov. 17, 1953 (dissertation research trip, detailed in "Route Book," which I've come across)


• Europe: April 1, 1962-Sep. 9, 1962


• Europe: July 15, 1968-Aug. 14, 1968


• Europe & Middle East: May 11-June12, 1969 (Ong has files for Egypt, Israel, Greece, and an unpublished travelogue about his time spent in Egypt and Israel. The legend in the atlas refers to a 1969 pocket diary, which I have not yet found)


• Italy: Sept 3-7, 1969


• Europe: Aug 18-Sept. 1, 1972


• Zaire, Cameroon, Nigeria, Senegal: Apr. 14-May12, 1974


• Stockholm, Tunisia, Morocco, Azores: May 25-June 1, 1975


• Europe June 19-July 4, 1979