how did rab get cilla to court?

Everyone has lunch at the Afric Queen. Rab explains how he got Cilla to court in time to testify. He had taken an official letter from the governor to the printer’s shop, which ordered the printer to stop printing rebel pamphlets. Rab showed Mrs. Lapham the letter and told her it was an order from the governor that Cilla must testify. Because Mrs. Lapham couldn’t read, she allowed Cilla to go to court. He had also coached Isannah in case the trick with the letter didn’t work.