"Mercury!" I exclaimed, fairly astounded. "Impossible!"

"Not at all."

"Oh, come!" said I sarcastically, "that won't do. A joke is a joke; but I'm not in a merry mood this morning."

"So I see. A laugh would do you good."

"Well, where are we?"

"In Mercury."

"What nonsense!" I ejaculated. "Last night I went to bed in Venus, and you want me to believe that I've woke up on Mercury. Tell that to the marines."

"Last night you say; but do you know how long you have slept? And have you forgotten that we are now so near the sun—that the attraction of the sun on the car has assisted the machines to propel us through the intermediate space?"

I had not thought of that.

"Then it is true."