It was the custom of the Professors of Edinburgh University, in the time of this amiable and learned man--as it is partly still--to receive at their own residences the fees from students intending to attend their lectures; some old students yet remembering that, when other material for the class-tickets failed, and sometimes even when it did not, the necessary formula was written on the back of a playing-card. While Dr. Gregory was one day at the receipt of fees, he left his room, in which was a single student, and went into an adjoining apartment for more admission cards. In this room there was a mirror, in which the doctor saw the student lift and pocket a portion of a pile of guineas that lay on the table. Dr. Gregory took no notice of what he had seen till he was showing the student out; but on the threshold he said, with a voice marked with deep emotion, "Young man, I saw what you did just now. Keep the money; I know what distress you must be in. But for God's sake never do it again; it can never succeed." The remorseful student sought in vain to persuade the Professor to take back the money: "No, this must be your punishment, that you must keep it now that you have taken it." The kind warning was not lost; the student, we are assured, turned out a good and honest man. At another time Gregory attended a poor medical student, ill of typhus fever, who offered him the customary fee of a guinea. The doctor refused it in silence, and with signs of annoyance and anger at the offer; whereupon the student hastily said, "I beg your pardon, Dr. Gregory; I did not know your rule. Dr. A. has always taken a fee." "Oh, he has, has he?" said Gregory; "then, my young friend, ask him to meet me here in consultation--and offer me the fee first." The consultation took place, and the student offered the fee; whereupon the good Gregory broke out: "Sir, do you mean to insult me? Is there a Professor in this University who would so far degrade himself, as to take payment from one of his brotherhood, and a junior?" Dr. A. did not enjoy the little scene that had been prepared for him; and that very day he returned the fees he had taken of the sick student. RUDE TRUTH FOR A QUEEN.