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, shifted the slips. At once he remembered the prohibition, and, with an almost continuous motion of his hands, moved it back, and sat paralysed with astonishment at his action. Then, slowly, he turned his head. The professor was out of the room; the demonstrator sat aloft on his impromptu rostrum, reading the _Q. Jour. Mi. Sci_.; the rest of the examinees were busy, and with their backs to him. Should he own up to the accident now? He knew quite clearly what the thing was. It was a lenticel, a characteristic preparation from the elder-tree. His eyes roved over his intent fellow-students, and Wedderburn suddenly glanced over his shoulder at him with a queer expression in his eyes. The mental excitement that had kept Hill at an abnormal pitch of vigour these two days gave way to a curious nervous tension. His book of answers was beside him. He did not write down what the thing was, but with one eye at the microscope he began making a hasty sketch of it. His mind was full of this grotesque puzzle in ethics that had suddenly been sprung upon him. Should he identify it? or should he leave this question unanswered? In that case Wedderburn would probably come out first in the second result. How could he tell now whether he might not have identified the thing without shifting it? It was possible that Wedderburn had failed to recognise it, of course. Suppose Wedderburn too had shifted the slide? He looked up at the clock. There were fifteen minutes in which to make up his mind. He gathered up his book of answers and the coloured pencils he used in illustrating his replies and walked back to his seat. He read through his manuscript, and then sat thinking and gnawing his knuckle. It would look queer now if he owned up. He _must_ beat Wedderburn. He forgot the examples of those starry gentlemen, John Burns and Bradlaugh. Besides, he reflected, the glimpse of the rest of the slip he had had was, after all, quite accidental, forced upon him by chance, a kind of providential revelation rather than an unfair advantage. It was not nearly so dishonest to avail himself of that as it was of Broome, who believed in the efficacy of prayer, to pray daily for a first-class. "Five minutes more," said the demonstrator, folding up his paper and becoming observant. Hill watched the clock hands until two minutes remained; then he opened the book of answers, and, with hot ears and an affectation of ease, gave his drawing of the lenticel its name.