Small notebook containing diary entries from 16 November 1938 - 21 February 1939. The entry for 21 December 1938 includes a sketch of an ice boat. The diary also includes a typed list of Germans who arrived at their camp on 8 January 1939 and a description of them within that day's diary entry. The entries contain both official and personal information.

A small notebook containing diary entries from 23 June 1939 - 8 March 1940. Mackenzie notes that on 10th August 1939, Professor G. Tucci visited who he writes is 'probably the world's best Tibetan scholar' and who he continued to meet with in the succeeding days. Alongside the entries of his own life are comments on the world news including the start of WW II. The regiment returned to Kolkata on 10th October 1939 and the diary entries subsequently contain information about his social life as well as war news and the death of Jemi Bikram Singh. He received authority for leave home on 19th December 1939 and travelled from Dum Dum to Jodhpur with Air France on 24 December, flew to Basra the following day and arrived in Baghdad on the 26th December. From there he went to Tunis and then Paris and reached England on 29 December 1939 when he returned to his wife to find her still poorly from pneumonia. The entry for 29th January 1940 contains three sketches made on his journey to London.

Lieutenant-Colonel Fleming Mackenzie of the 1st Battalion of the Fifteenth Punjab Regiment commanded the Escort to the Trade Agent in Tibet in 1938-1939. This material contains original diaries written whilst in Tibet, later typed drafts of these diaries, essays written about his experiences, hand-drawn maps and other material associated with his visit.

A small notebook containing diary entries from 8 August - 15 November 1938. The entries are often illustrated with sketches. At the beginning of the book are also lists of departures and arrivals for August 1938, contents of his boxes, distances and altitudes of places visited, and rates charged for helpers and ponies. Interspersed with the last few diary entries are further lists and notes: Phari etc. Prices, Gangtok Nov. 1938 activities; recoverable expenses for various stages of the journey; further lists of expenses; a newspaper cutting for 'butterflies for cash'; sketch of a Tibetan man in a hat and carrying a knife; boxes in Alipore; and an address for Elizabeth, c/o Madame Pradon-Vallency. Inserted into the diary is a postcard of Babbacombe Beach, Devon, from Jean to Fleming Mackenzie, dated 24 April 1978, giving holiday news.