Is this small passage correctly worded?

Bareris killed several of the soldiers, but he was soon incapacitated by the wizards and barely managed to use his magic to escape. Before the Red Wizards or the guards could find him, Bareris was saved by a small band of gnoll warriors who formerly served in the Thayan legions. While the slave procession continued its journey north, Bareris was taken to the gnolls’ encampment and learned from them that Tammith and the other slaves were being taken to the ruined city of Delhumide. Bareris used his magical talents to convince the gnolls to assist him in secretly entering Delhumide and rescuing Tammith