Several more lots sold so rapidly at three dollars that Mark had no opportunity of making himself heard or of catching the auctioneer's eye, until, finally, in a sort of despair he called out "Quarter," just as another lot was about to be knocked down to a dealer at three dollars. "Ah!" said the auctioneer, "that is something like. It takes a gentleman from the North to appreciate oranges at their true value. A quarter is bid. Shall I have a half? Do I hear it? Half, half, half; and sold at three dollars and a quarter to Mr.---what name, please? Elder. Oh yes; good old name, and one you can live up to more and more every day of your life. John, pick out a hundred of the best for Mr. Elder." The oranges selected by John were such beauties that neither Mark nor his mother regretted the extra quarter paid for them. After that, during the rest of their stay in Key West, whenever Mark went near a fruit auction he was addressed politely by the auctioneer as "Mr. Elder," and invited to examine the goods offered for sale that day. One day Mark and Ruth rowed out among the vessels of the sponging fleet that had just come in from up the coast. Here they scraped acquaintance with a weather-beaten old sponger, who sat in the stern of one of the smallest of the boats, smoking a short pipe and overhauling some rigging; and from him they gained much new information concerning sponges. "We gets them all along the reef as far as Key Biscayne," said the old sponger; "but the best comes from Rock Island, up the coast nigh to St. Mark's." "Why, that's where we're going!" interrupted Ruth. "Be you, sissy? Wal, you'll see a plenty raked up there, I reckon. Did you ever hear tell of a water-glass?" "No," said Ruth, "I never did." "Wal," said the old man, "here's one; maybe you'd like to look through it." And he showed them what looked like a wooden bucket with a glass bottom. "Jest take an' hold it a leetle ways down into the water and see what you can see." Taking the bucket which was held out to her, Ruth did as the old man directed, and uttered an exclamation of delight. "Why, I can see the bottom just as plain as looking through a window." "To be sure," said the old sponger; "an' that's the way we sees the sponges lying on the bottom. An' when we sees 'em we takes those long-handled rakes there an' hauls 'em up to the top. When they fust comes up they's plumb black, and about the nastiest things you ever did see, I reckon. We throws 'em into crawls built in shallow water, an' lets 'em rot till all the animal matter is dead, an' we stirs 'em up an beats 'em with sticks to get it out. Then they has to be washed an' dried an' trimmed, an' handled consider'ble, afore they's ready for market. Then they's sold at auction."