Subject
- Security of property[remove]4
- Bilateral agreements2
- Subsidies2
- Telegraph lines2
- Civil aircraft1
- Civil aviation1
- Diplomacy1
- Handley Page H.P. 42 (Transport plane)1
- Landing grounds1
- Military incursions1
- Military intelligence1
- Negotiation1
- Political conflicts1
- Political intelligence1
- Seaplanes1
- Security1
- Short S.8 Calcutta (Seaplane)1
- Treaties1
- Tribal relations1