13. 'File 10/21 (10/1 B) Bahrain Oil Concession: Proposal by the Bahrain Petroleum Company Limited to install radio telephones' Date: 1933/1942 Language: English
14. Title deed plan of land at Umm al Hasam, Manamah Date: 1944/1944 Language: Arabic Geographic region: JufairJazīreh-ye Hengām
15. Title deed plan of land at Ghosaibia, Manamah Date: 1944/1944 Language: Arabic Geographic region: JufairJazīreh-ye Hengām
17. File 4535/1928 Pt 7 ‘Persia. Telegraphs’ Date: 1930/1931 Language: English Geographic region: Persia