"But, Doctor, you may have erred in your calculations. Do you really think it wise to take such a pessimistic view of our situation?" answered Graham, with a hopefulness that he was far from actually feeling. "If Temple can spare us a moment, ask him to join us, and I will endeavour to explain our actual position, and the prospects we have before us." "A horrible one! A most horrible one!" the Doctor muttered under his breath, as Graham walked thoughtfully away. Temple and Graham joined the Doctor almost immediately. "Now, Doctor, what have you got to tell us this time? What new discovery have you made? Nothing unpleasant, I sincerely hope," said Temple, in his usual cheery way. "My dear friends," began the Doctor, "I am afraid I have bad news to communicate--very bad news. But let us look the situation squarely in the face, and discuss it calmly and philosophically, as becomes intelligent men." "Many weeks ago," continued the Doctor, "I explained to Graham and yourself that our centre of gravity had changed from the Earth to the sun; instead of earth glimmering at our feet, nineteen millions of miles below us, we have the fiery sun, as both of you cannot have failed to observe. This I must hasten to explain, is cause for no surprise; it is just what I expected would be the case until we came within the attractive forces of Mars. But my instruments have demonstrated that our motors are now absolutely of no use. They are working just as usual, but our speed increases rather than diminishes, and from this I infer we are influenced by some vast attractive force. That centre of attraction to which we seem hurrying can only be the sun! No further words of mine are needed to render more clear the horrible doom which awaits us." As he finished speaking, the Doctor rested his head on his hand, the usual attitude he assumed when engaged in deep thought. "But, Doctor, before we take all this for granted, at least let us satisfy ourselves more completely that things are really so bad," said Graham. "No use, Graham, no use; I have studied these matters too long and too carefully needlessly to alarm you," answered the Doctor. "Well, Doctor," said Graham, "at least allow me to stop our motors. Then what you say cannot possibly be refuted." "I think Graham is right, Doctor," remarked Temple. "It seems to me a very practical suggestion." "You may do so if you like, but it is trouble thrown away," the Doctor answered. Graham was already hastening from the laboratory down the steps to the engine-room, followed by his two friends, and a moment afterwards the machinery ceased to work; the bright cranks and wheels and rods were still; the motors ceased to revolve. At last this beautiful monument of engineering skill, which had kept incessantly at work for upwards of eighteen months, was stopped, and breathlessly the three men awaited the result.