12 Picture Postcard : R.M.S. Queen Mary (July
1, 1936) [Prof. Saha went to U.S.A. in
1936 on board this ocean liner].
13 Picture Postcard : Grand Canyon, U.S.A.
(since Prof. Saha’s travel route in U.S.A. in 1936 was Boston – Philadelphia
– Washington D.C. –St. Louis – Flagstaff – Grand Canyon – Mount Wilson –
Boston. [see, letter RRS-1936-20-1(B)].