We have been keeping Lindsay waiting. When he had nothing special to do, he sat indifferently in his chair, with the face of a precentor after the sermon has begun. But though it was not very likely that Lindsay would pay much attention to talk about such playthings as the laws of nature, his fingers went out in the direction of the professor when the experiments began. Then he was not the precentor; he was a minister in one of the pews. Lindsay was an inscrutable man, and I shall not dare to say that he even half-wished to see Tait fail. He only looked on, ready for any emergency; but if the experiment would not come off, he was as quick to go to the professor's assistance as a member of Parliament is to begin when he has caught the Speaker's eye. Perhaps Tait would have none of his aid, or pushed the mechanism for the experiment from him--an intimation to Lindsay to carry it quickly to the ante-room. Do you think Lindsay read the instructions so? Let me tell you that your mind fails to seize hold of Lindsay. He marched the machine out of Tait's vicinity as a mother may push her erring boy away from his father's arms, to take him to her heart as soon as the door is closed. Lindsay took the machine to his seat, and laid it before him on the desk, with well-concealed apathy. Tait would flash his eye to the right to see what Lindsay was after, and there was Lindsay sitting with his arms folded. The professor's lecture resumed its way, and then out went Lindsay's hands to the machine. Here he tried a wheel; again he turned a screw; in time he had the machine ready for another trial. No one was looking his way, when suddenly there was a whizz--bang, bang. All eyes were turned upon Lindsay, the professor's among them. A cheer broke out as we realized that Lindsay had done the experiment. Was he flushed with triumph? Not a bit of it; he was again sitting with his arms folded. A Glasgow merchant of modest manners, when cross-examined in a law court, stated that he had a considerable monetary interest in a certain concern. "How much do you mean by a 'considerable monetary interest'?" demanded the contemptuous barrister who was cross-examining him. "Oh," said the witness, humbly, "a maiter o' a million an' a half--or, say, twa million." That Glasgow man in the witness-box is the only person I can think of, when looking about me for a parallel to Lindsay. While the professor eyed him and the students deliriously beat the floor, Lindsay quietly gathered the mechanism together and carried it to the ante-room. His head was not flung back nor his chest forward, like one who walked to music. In his hour of triumph he was still imperturbable. I lie back in my chair to-day, after the lapse of years, and ask myself again, How did Lindsay behave after he entered the ante-room, shutting the door behind him? Did he give way? There is no one to say. When he returned to the class-room he wore his familiar face; a man to ponder over.