"The Ethels went up. They haven't done talking about it yet. They named the man's machine, so he gave them a ride."
"Good work! Look out for these corners, now. When you've studied physics a bit longer you'll learn why it is that a speeding body can't change its direction at an angle of ninety degrees and maintain its equilibrium unless it decreases its speed."
James thought this over for a while.
"In other words, slow up going round corners," he translated, "and later I'll learn why."
"Words to that effect," replied the doctor mildly.
"Here's a good straight bit," exclaimed James. "You don't care if I let her out, do you? There's nothing in sight."
"Watch that cross road."
"Yes, sir. Isn't this moon great!" murmured James under his breath, excited by the brilliant light and the cool air and the swift motion.
"Always keep your eyes open for these heavy shadows that the moon casts," directed Doctor Hancock. "Sometimes they're deceptive."
"I'll keep in the middle of the road and then the bugaboo in the shadow can see us even if I can't see him," laughed James, the moonlight in his eyes and the rush of wind in his ears.