Then in 1929, the tax was doubled. Riots broke out in several towns, and a substantial team escaped to Bahrain and asked for protection through the British consul. The governor of Qatif responded with intimidation and mass imprisonments. Quite a few notables wrote letters to King Abdulaziz voicing their complaints. https://social-medialink.com/story3917239/how-eastern-province-can-save-you-time-stress-and-money