At the bottom of some of the bridges there are heaps of rubbish and old rotting planking, some of which rubbish is carried off when the tide leaves the stones of the bridges. Then there are old boat-houses, and rows of long, stout-built boats for hire; but at night there are no persons to watch these boats, and they are used as berths to sleep in by the vagrant vagabonds who haunt the recesses of the bridges. When the tide recedes in the Thames, it generally leaves a space of twenty to two hundred feet of the inshore bottom of the river bare on the Surrey side, and this is generally a soft, drab-looking mud, with a treacherous look, where man or beast might be swallowed up without any warning. When the detective and I went down into the dark recesses of London Bridge, that night, the river was at the flood, and the rubbish was being carried away by the incoming tide. This was on the Surrey side of the river. There were about a dozen persons beneath the first archway, making, in fact, a perfect gypsy encampment. Eight of these persons were of the male sex, and beside these there were two old haggard-looking women and a grown girl of twenty years or thereabouts, and a child of ten years, in all the glory of rags and destitution. The oldest man in the party might have been fifty years of age, and the others were younger, one of them being a stout, able-bodied young fellow of eighteen or nineteen. Some of the party were asleep, and were snoring most comfortably, as the rain did not penetrate to their place of sleeping; but every few minutes a gust of wind came howling down the river and burst through the arches with a mad fury, making the sleepers turn uneasily on the stone steps. [Illustration: THE CADGER'S MEAL.] The old fellow, who seemed to be a confirmed vagrant, from his slouchy look and greasy, unpatched clothes, had built a small fire of the refuse which abounded in the arches, and he was drying pieces of driftwood that had floated from the scaffolding on the new Blackfriar's Bridge down the river. He was warming his hands and slapping them, and the little girl of ten years was stooped over the fire, toasting an enormous potato on the end of a splinter of wood. [Sidenote: THE LOST GIRL.] "What are you herding here for, Prindle," said the detective to the old fellow, who looked up in a morose way and muttered something under his teeth which sounded like "D----n the bobbies." "I'm a trying to get somethink to heat. Vy vill yer foller a cove everywheres as wants to get a mouthful to heat. I haint done nothink as should bring you here arter me. I'm not hon the pad now hany more." "I don't want yer pertikler, I don't; but stop yer jaw and keep a civil tongue in yer head, will ye," said the sergeant. "Whose gal is that ere a toasting the taty with the skiver?"