Percy Cox was engrossed with events in Europe. Among his other achievements while at Bushire was the establishment of the state of Kuwait as an autonomous kaza within the Ottoman Empire by the Anglo-Ottoman Convention of 1913, where he improved relations with local ruler, Mubarak, by opening negotiations with Ibn Saud. The Turks signed a treaty in London on July 29, 1913 concerning Royal Navy patrols in the Persian Gulf littoral, when Cox met then at the Port of Uqair on 15 December 1913. Cox noted their "intractability" and also warned the Foreign and Commonwealth Office about Ibn Saud; the "increased authority
Anglo-Ottoman Convention of 1913 Ottoman jurisdiction. This line separated the Ottoman sanjak of Najd from Qatar. The blue line began a few miles to the south of Zaknuniya (which was included in the sanjak), directly south up to the Rub' al-Khali (Article 11). The agreement did not mention that Zaknuniya would be part of the Najd sanjak in return for an Ottoman consideration of £ 1,000 paid to the Sheikh of Bahrain via the British government. With regard to Bahrain, the Ottomans renounced all claims to it so long as the British declared no intention of annexing it (Article 13) and did not claim