25. 'File 61/11 VII (D 122) Hejaz-Nejd Miscellaneous' Date: 1934/1936 Language: English Geographic region: Soviet UnionYemenAl-Hasa
26. 'File 61/11 X (D 170) Nejd-Hejaz Miscellaneous' Date: 1942/1945 Language: English Geographic region: United States of AmericaAl-Hasa
27. 'File 61/14 VII (D 51) Relations between Nejd and Iraq' Date: 1928/1928 Language: English Geographic region: IraqKuwaitAl-Hasa
28. 'File 61/14 VIII (D 55) Relations Between Nejd And Iraq' Date: 1928/1929 Language: English Geographic region: IraqAl-Hasa
29. 'File 61/14 X (D 57) Relations between Nejd and 'Iraq' Date: 1929/1929 Language: English Geographic region: KuwaitAl-HasaIraq
31. 'File XXV/2 Arabian Affairs (including Iraq). Qatar and al Hassa (Bin Saud)' Date: 1913/1914 Language: English Geographic region: Al-HasaQatar
32. ‘File 16/1 II Correspondence with the American Mission’ Date: 1945/1948 Language: English Geographic region: Hassa
33. 'File 5/190 V Manumission of slaves at Muscat: individual cases' Date: 1935/1939 Language: English Geographic region: MuscatAl-Hasa
34. 'File 19/109 II (C 17) Bahrain: Relations of Chief with other Foreign Powers' Date: 1913/1922 Language: English Geographic region: ZubarahAl-Hasa
35. ‘26 File 626 Qatar and Bahrain affairs: action of Shaikh Jasim ibn Muhammad Al Thani against al-`Udaid’ Date: 1881/1886 Language: English Geographic region: Al-HasaQatarAbu DhabiEl Katiff
36. 'Persian Gulf Gazetteer Part II, Geographical and Descriptive Materials, Section II Western Side of the Gulf' Date: 1904/1904 Language: English Geographic region: الأحساءالبحرينالكويتالإمارات المتصالحةقطربوشهرأبو شهرجزيرة هرمز