25. 'File 5/2 IV Kuwait Neutral Zone' Date: 1939/1947 Language: English Geographic region: Kuwait-Saudi Arabia Neutral Zone
26. 'File 5/2 V Kuwait Neutral Zone' Date: 1947/1948 Language: English Geographic region: Kuwait-Saudi Arabia Neutral Zone
27. 'File 5/2 VI Kuwait Neutral Zone' Date: 1948/1949 Language: English Geographic region: Kuwait-Saudi Arabia Neutral Zone
28. 'File 5/3 Possibility of a Concession for Asir oil' Date: 1934/1934 Language: English Geographic region: Asir
32. File 2794/1921 Pt 16 'Persian Gulf: Oil Bahrain. Calibration of Tanks and measurement of oil.' Date: 1934/1942 Language: English Geographic region: Bahrain
33. File 2794/1921 Pt 17 'Persian Gulf: oil; tables of quantities produced by Bahrain Petroleum Co Ltd' Date: 1934/1934 Language: English Geographic region: Bahrain