The Fire Brigade is a wonderful power, and the brave men who belong to it perform heroic things in daily life without making any fuss. There are brigade stations all over London, and if a fire breaks out, it takes only a few minutes for the brigade to be summoned. Not so very long ago all the engines were drawn by specially trained horses who stood ready in their stalls, with the harness swinging above them. At the first sound of the alarm bell the harness was lowered, the straps buckled, and in a few moments the fire-engines were on the road. But now all the London fire-engines are run by motor power. In the streets there are little red posts with a glass at the top. By breaking it a bell is rung in the nearest fire station, and the men are warned. Mischievous boys or men sometimes broke these glasses 'just for fun,' and then ran away, and when the fire-engine dashed round the corner the men found no fire. This has been stopped by the infliction of a very heavy fine. If anyone is caught doing it now without cause he is made to pay richly for his mischief, and quite rightly too. Yet it does happen sometimes that men and engine are summoned on a false alarm, and when they arrive they find only a smouldering chimney, or perhaps even only a smoky one, and the people who have called them up have been needlessly alarmed. At Hampstead, in the north of London, where the ground is very high, there is a great tower rising many feet into the air, from which one can see almost all over London, and here there is a man always on duty to watch if fires break out. Of course, it would be a pretty big fire if he could see it from there, but then he could communicate with the nearest station and tell them to go to it. It must be a curious duty to stay all night at that great height overlooking the vast city of London. Sometimes a fire breaks out in some of the great warehouses down by the river, and then there is a magnificent sight. One such warehouse was full of paraffin oil, and you know paraffin burns more readily than anything else. As the barrels were caught by the flames the oil streamed out on to the water, and, floating on the top, seemed like a sea of flame. It must have been wonderful to see. The heat was so great that no one could go near, but on the opposite bank thousands of people assembled and watched the flames. There were flames above and flames below, fire shooting to the sky, and fire flowing down on the river's tide. The water reflected the fire above, and the fire that floated on its surface. It must have seemed like a burning world. That was a very difficult task for the brigade. Sometimes the brave men themselves are injured or killed in the execution of their work, and at all times when engaged with a fire they run some risk.