At the time, there were eight ships in the bay awaiting departure, but they dared not pass by Blackbeard's fleet. All inward bound vessels remained at sea so that all trade to Charleston came to a halt. The poor citizens of Charleston had just fought a long expensive war with the surrounding natives and were in no mood to deal with Blackbeard.
Blackbeard sent a parlay group which included Richards, the captain of the Revenge, three pirates, and Mr. Marks, one of the prisoners whom they had taken off Clark's ship. His only demand to the citizens of Charleston? A "Chest of Medicines". In addition he wanted his men returned unharmed. If these demands were not met Blackbeard would "murder all their prisoners, send up their heads to the governor, and set the ships they had taken on fire."
While Mr. Marks was relaying this information to the city council, the rest of the pirates walked the streets of Charleston in the sight of all the people, who were full of rage and indignant at having to watch these "robbers and murderers" walk about free and not be able to do anything about it. Instead, they were forced to "let the villains pass with impunity"
In light of how many lives would be saved, (as well as one of their own councilmen, Samuel Wragg who had been captured), the council had no choice but to give into Blackbeard's demands. They sent aboard a chest, valued at between 300 and 400 pounds and the pirates went back safe to their ships.
As soon as Blackbeard received the chest, he released all the prisoners and ships, but not after taking relieving them of all their gold and silver and other provisions. And six days after he sailed into the bay, he and his fleet left.
Fascinating! You can't make this stuff up!