Cosmo glanced around and above, seeming to be as much astonished as the captain had been. He rubbed his huge bald dome and looked all round again before speaking. At last he said:

"It's the nebula again. There must be a hole in it."

"Its whole bottom's knocked out, I reckon," said the captain. "Maybe it's run out of water—sort o' squeezed itself dry."

Cosmo shook his head.

"We are not yet in the heart of it," he said. "It is evident to me now that what I took for the nucleus was only a close-coiled spiral, and we're run out of that, but the worst is yet to come. When we strike the center, then we'll catch it, and there'll be no more intermissions."

"How long will that be?" inquired Captain Arms.

"It may be a week, and it may be a month, though I hardly think it will be so long as that. The earth is going about twelve miles a second—that's more than a million miles a day—directly toward the center of the nebula. It has taken ten days to go through the spiral that we have encountered, making that about ten million miles thick. It's not likely that the gap between this spiral and the nucleus of the nebula is more than thirty million miles across, at the most; so you see we'll probably be in the nucleus within a month, and possibly much less than a month."

Captain Arms took a chew of tobacco.

"We can get our bearings now," he remarked. "Look, there's the moon just
rising, and on my word, she is going to occult Aldebaran within an hour.
I'll get an observation for longitude, and another on Polaris for latitude.
No running on submerged mountains for us now."

The captain was as good as his word, and when his observations had been made and the calculations completed he announced that the position of the Ark was: Latitude, 16 degrees 10 minutes north; longitude, 42 degrees 28 minutes west.