"Doesn't it? and isn't it hard to believe? I used to go, now and then, to see how the little fellows got on, and always found them hard at it. For a long while there was only a little plant without leaves, growing slowly taller and taller; for they always build upward toward the light. By and by, the small shrub was a tree: flying-fish roosted in its branches; sea-cows lay under its shadow; and thousands of jolly little polypes lived and worked in its white chambers. I was glad to see them getting on so well; but still I didn't believe in the island story, and used to joke them about their ambition. They were very good-natured, and only answered me, 'Wait a little longer, Friend Right.' I had my own affairs to attend to; so, for years at a time, I forgot the coral-workers, and spent most of my life up Greenland way, for warm climates don't agree with my constitution. When I came back, after a long absence, I was astonished to see the tree grown into a large umbrella-shaped thing, rising above the water. Sea-weed had washed up and clung there; sea-birds had made nests there; land-birds and the winds had carried seeds there, which had sprung up; trunks of trees had been cast there by the sea; lizards, insects, and little animals came with the trees, and were the first inhabitants; and, behold! it _was_ an island." "What did you say then?" asked Freddy. "I was angry, and didn't want to own that I was wrong; so I insisted that it wasn't a real island, without people on it. 'Wait a little longer,' answered the polypes; and went on, building broader and broader foundations. I flounced away in a rage, and didn't go back for a great while. I hoped something would happen to the coral builders and their island; but I was so curious that I couldn't keep away, and, on going back there, I found a settlement of fishermen, and the beginning of a thriving town. Now I should have been in a towering passion at this, if in my travels I hadn't discovered a race of little creatures as much smaller than polypes as a mouse is smaller than an elephant. I heard two learned men talking about diatoms, as they sailed to Labrador; and I listened. They said these people lived in both salt and fresh water, and were found in all parts of the world. They were a glassy shell, holding a soft, golden-yellow substance, and that they were so countless that banks were made of them, and that a town here in these United States was founded on them. They were the food of many little sea-animals, who, in turn, fed us big creatures, and were very interesting and wonderful. I saved up this story; and, when the polypes asked if they hadn't done what they intended, I told them I didn't think it so very remarkable, for the tiny diatoms made cities, and were far more astonishing animals than they. I thought that would silence them; but they just turned round, and informed me that my diatoms were plants, not animals,--so my story was all humbug.