"What is that? Not the sea, surely!"
"Yes, those are the waves of the Firth of Forth breaking on the shores of Fife."
"What! Do you mean to tell me that we have crossed Scotland already? Why, we have not been an hour on the way yet!"
"Oh yes, we have," replied the engineer. "We have been nearly two. You have been so busy looking about you that you have not noticed how the time has passed. We have travelled a little over two hundred and forty miles. We are over the German Ocean now, and as there will be no more hills until we reach the Ourals we can go down a little."
As he spoke he moved the lever beside him about an inch, and instantly the clouds seemed to rise up toward them as the Ariel swept downwards in her flight. A hundred feet above them Arnold touched the lever again, and the air-ship at once resumed her horizontal course.
Then he put her head a little more to the northward, and called down the speaking tube for Andrew Smith to come and relieve him. A minute later Smith's head appeared at the top of the companion-ladder which led from the saloon to the wheel-house, and Arnold gave him the wheel and the course, saying at the same time to Colston—
"Now, come down and have something to eat, and then we will have a smoke and a chat and go to bed. There is nothing more to be seen until the morning, and then I will show you Petersburg as it looks from the clouds."
"If you told me you would show me the Ourals themselves, I should believe you after what I have seen," replied Colston, as together they descended the companion-way from the wheel-house to the saloon.
"Ah, I'm afraid that would be too much even for the Ariel to accomplish in the time," said Arnold. "Still, I think I can guarantee that you shall cross Europe in such time as no man ever crossed it before."