Food, however, is only one of the materials which will be collected by the Household Salvage Brigade. The barges which float down the river with the tide, laden to the brim with the cast-off waste of half a million homes, will bring down an enormous quantity of material which cannot be eaten even by pigs. There will be, for instance, the old bones. At present it pays speculators to go to the prairies of America and gather up the bleached bones of the dead buffaloes, in order to make manure. It pays manufacturers to bring bones from the end of the earth in order to grind them up for use on our fields. But the waste bones of London; who collects them? I see, as in a vision, barge loads upon barge loads of bones floating down the Thames to the great Bone Factory. Some of the best will yield material for knife handles and buttons, and the numberless articles which will afford ample opportunity in the long winter evenings for the acquisition of skill on the part of our Colonist carvers, while the rest will go straight to the Manure Mill. There will be a constant demand for manure on the part of our ever-increasing nests of new Colonies and our Co-operative Farm, every man in which will be educated in the great doctrine that there is no good agriculture without liberal manuring. And here will be an unfailing source of supply. Among the material which comes down will be an immense quantity of greasy matter, bits of fat, suet and lard, tallow, strong butter, and all the rancid fat of a great city. For all that we shall have to find use. The best of it will make waggon grease, the rest, after due boiling and straining, will form the nucleus of the raw material which will make our Social Soap a household word throughout the kingdom. After the Manure Works, the Soap Factory will be the natural adjunct of our operations. The fourth great output of the daily waste of London will be waste paper and rags, which, after being chemically treated, and duly manipulated by machinery, will be re-issued to the world in the shape of paper. The Salvation Army consumes no less than thirty tons of paper every week. Here, therefore, would be one customer for as much paper as the new mill would be able to turn out at the onset; paper on which we could print the glad tidings of great joy, and tell the poor of all nations the news of salvation for earth and Heaven, full, present, and free to all the children of men.