Ye of Little Faith

The disappearance of John Henderson was most spectacular. It occurred while he was at the blackboard working an example in multiple integration for his ten o'clock class. The incompleted problem remained on the board for three days while the police worked on the case. It, a wrist watch and a sterling silver monogrammed belt buckle, lying on the floor near where he had stood, were all the physical evidence they had to go on. There was plenty of eye-witness evidence. The class consisted of forty-three pupils. They all had their eyes on him in varying degrees of attention when it happened. Their accounts of what happened all agreed in important details. Even as to what he had been saying.