spade; the spade and sieve being used for examining any deposit which promises to contain some article of value. The moment the rat sees the light, he runs along the sides of the drain just above the line of the sewage water; the men follow, and speedily overtake the winded animal, which no sooner finds his pursuers gaining upon him, than he sets up a shrill squeak, in the midst of which he is seized with the bare hand behind the ears, and deposited in the bag. In this manner a dozen will sometimes be captured in as many minutes. When driven to bay at the end of a blind sewer, they will often fly at the boots of their pursuers in a most determined manner. The favourite stronghold of the rat is that portion of the house-drain which opens at right angles into the main sewer. Here he sits like a sentinel, and in security watches with his keen but astonished eyes the extraordinary apparition running with a light. It is a remarkable fact that most untrapped house-drains are inhabited by their own particular rats, and woe be to the intruder who ventures to interfere with those in possession. The rat as well as the cat may thus be classed among the domestic animals of the household, who acts as a kind of preventive puss in keeping out the whole underground community of vermin, which otherwise would have the run of our basements. These vermin congregate thickest in the neighbourhood of slaughter-houses, or, in other words, where food is most plentiful. They are frequently found sitting in clusters on the ledge formed by the invert of the sewers. As the scavengers of drains, they undoubtedly do good service, but it is a poor set-off for the mischief they perpetrate in destroying the brickwork of the sewers--burrowing in every direction, and thus constructing lateral cesspools, the contents of which permeate the ground and filter into the wells. In making these excavations, moreover, they invariably transfer the earth to the main sewers, and form obstructions to the flow. The accumulations of their paw-work have regularly to be removed in small trucks constructed for the purpose, and if this precaution were not taken, they would in a few years entirely destroy the vast system of subterranean culverts which have been laboriously constructed at the expense of millions. The pipe-drains with smooth barrels, which the rat's tooth cannot touch, alone baffle him; indeed, the rapid flow of water in their narrow channel prevents his even retaining his footing in them. In revenge for thus being circumvented, he has in many cases entirely ruined the newly-laid channel of pipes by burrowing under them, and causing them to dip and open at the joints.