The Indian chief of Potomac, and other northern werowances and mangais, were required to give hostages of their children and others, who were to be kindly treated and instructed in English, as far as practicable. Measures were taken to bring Indian murderers to justice, especially the hostile Doeggs. The chief of Potomac was inhibited from holding any matchacomico, or council, with any strange tribe, before the delivery of hostages. John Bland, a London merchant, and brother of Theodoric Bland, a leading man in Virginia, received the thanks of the assembly for goods advanced for the use of the colony. In this year, 1663, a conference was held, by royal command, at Mr. Aleston's, at Wicocomico, in Virginia, in May, by commissioners appointed by Governor Berkley, and Charles Calvert, Governor of Maryland, for the purpose of devising means of improving the staple of tobacco. The Virginia commissioners were Thomas Ludwell, secretary, Richard Lee, John Carter, Robert Smith, and Henry Corbin. The Maryland commissioners were Philip Calvert, Henry Sewall, secretary, Edward Koydes, and Henry Coursey. They recommended that in the year 1664 no tobacco should be planted after the twentieth day of June. In 1665 further acts were passed to prevent the depredations of Indians. If a white should be murdered, the nearest Indian town was held responsible; the Indian werowances to be in future appointed by the governor; colonists to go armed to church, court, and other public meetings; Indians south of the James River, not to cross a line extending from the head of Blackwater River to the Appomattox Indian town, (probably where Petersburg now stands,) and thence across to the Mannakin town.