"The captain looked around, but the sailors were as cool as he was--they were reassured by his honest explanation. Then he took me by the arm, and, pointing to the painting in the sky, said: 'Old man Providence again, son, sure as you are born; do you see that lane through the great ring? There's an open, fairly straight passage to the inner ocean, except that it's closed by about three miles of ice on our side; see it there, on the port side?' "Yes, I could see it, but I asked Captain Burrows how he could account for the open passages beyond and the wall of ice in front; it was cold water going in. "'It's strange,' he answered, shading his eye with his hand, and looking long at the picture of the clear passage, like a great canal between the beetling cliffs. All at once, he grasped my arm and said in excitement, pointing towards the outer end of the passage: 'Look!' "As I looked at the mirage again, the great mass of ice in front commenced to slowly turn over, outwardly. "'It's an iceberg, sir, only an iceberg!' said the captain, excitedly, 'and she is just holding that passage because the current keeps her up against the hole; now, she will wear out some day, and then--in goes the "Duncan McDonald"!' "'But there are others to take its place,' and I pointed to three other bergs, apparently some twenty miles away, plainly shown in the sky; 'they are the reinforcements to hold the passage.' "'Looks that way, son, but by the great American buzzard, we'll get in there somehow, if we have to blow that berg up.' [Illustration: "_A white city ... was visible for an instant._" (_page 292._)] "As we looked, the picture commenced to disappear, not fade, but to go off to one side, just as a picture leaves the screen of a magic lantern. Over the inner ocean there appeared dark clouds; but this part was visible last, and the clouds seemed to break at the last moment, and a white city, set in green fields and forests, was visible for an instant, a great golden dome in the center remaining in view after the rest of the city was invisible. "'A rainbow of promise, son,' said the captain. "I looked around. The others had grown tired of looking, and were gone. Captain Burrows and myself were the only ones that saw the city. "We got under way for an hour, and then stood by near the berg until eight bells the next morning; but you must remember it was half dark all the time up there then. While Captain Burrows and myself were at breakfast, he cudgeled his brains over ways and means for moving that ice, or preventing other bergs from taking its place. When we went on deck, our berg was some distance from the mouth of the passage, and steadily floating away. Captain Burrows steamed the ship cautiously up toward the passage; there was a steady current coming out. "'I reckon,' said Eli Jeffries, 'they must have a six-months' ebb and flow up in that ocean.'