demonstrator on a chair on a table (where he felt, he said, like a Hindoo god) to see all the cheating, and stuck a notice outside the door, "Door closed," for no earthly reason that any human being could discover. And all the morning from ten till one the quill of Wedderburn shrieked defiance at Hill's, and the quills of the others chased their leaders in a tireless pack, and so also it was in the afternoon. Wedderburn was a little quieter than usual, and Hill's face was hot all day, and his overcoat bulged with text-books and note-books against the last moment's revision. And the next day, in the morning and in the afternoon, was the practical examination when sections had to be cut and slides identified. In the morning Hill was depressed because he knew he had cut a thick section, and in the afternoon came the mysterious slip.
It was just the kind of thing that the botanical professor was always doing. Like the income tax, it offered a premium to the cheat. It was a preparation under the microscope, a little glass slip, held in its place on the stage of the instrument by light steel clips, and the inscription set forth that the slip was not to be moved. Each student was to go in turn to it, sketch it, write in his book of answers what he considered it to be, and return to his place. Now, to move such a slip is a thing one can do by a chance movement of the finger, and in a fraction of a second. The professor's reason for decreeing that the slip should not be moved depended on the fact that the object he wanted identified was characteristic of a certain tree stem. In the position in which it was placed it was a difficult thing to recognise, but once the slip was moved so as to bring other parts of the preparation into view, its nature was obvious enough.
Hill came to this, flushed from a contest with staining re-agents, sat down on the little stool before the microscope, turned the mirror to get the best light, and then, out of sheer habit, shiftedthe
