On 23 May 1915, Emir Faisal bin Hussein—the third son of Hussein—was presented with the document that became known as the Damascus Protocol. Faisal was in Damascus to resume talks with the Arab secret societies al-Fatat and Al-'Ahd that he had met in March/April; in the interim he had visited Istanbul to confront the Grand Vizier with evidence of an Ottoman plot to depose his father. The document declared the Arabs would revolt in alliance with the United Kingdom and in return the UK would recognize Arab independence in an area running from the 37th parallel near the Taurus Mountains on the southern border of Turkey, to be bounded in the east by Persia and the Persian Gulf, in the west by the Mediterranean Sea and in the south by the Arabian Sea.