midnight
`` I guess Mrs. Tellingham would have something to say about it , too , '' declared Helen . It was not the subject of school clubs that was the burden of Ruth Fielding 's thought for most of that day , however . Nor did the arrival of so many new scholars put the main idea in her mind aside . This troubling thought was of Miss Picolet and the sound of the harp on the campus at midnight . The absence of the French teacher from the dormitory , the connection of the little lady with the obese foreigner who played the harp on the _ Lanawaxa _ , and the sounding of harp-strings on the campus in the middle of the night , were all dovetailed together in Ruth Fielding 's mind . She wondered what the mystery meant . She saw Tony Foyle cleaning the campus lanterns during the day , and she stopped and spoke to him .