Read it through once

“Our treasure,” wrote Mrs. Mitford to her husband whilst she was on a short visit to the school, “was much amused yesterday morning. In her astronomical lecture, she not only completely posed Miss Rowden, but M. St. Quintin himself could not reconcile a contradiction which she had discovered in the author they were perusing. You cannot have an idea of the gratification the dear little rogue feels in puzzling her instructors.”