Now, is that the kind of thing you want to come to everywhere? Because, if it be, and you tell me so distinctly, I think I can make several suggestions to-night, and could make more if you give me time, which would materially advance your object. The extent of our operations at present is more or less limited by the extent of coal and ironstone, but we have not yet learned to make proper use of our clay. Over the greater part of England, south of the manufacturing districts, there are magnificent beds of various kinds of useful clay; and I believe that it would not be difficult to point out modes of employing it which might enable us to turn nearly the whole of the south of England into a brickfield, as we have already turned nearly the whole of the north into a coal-pit. I say "nearly" the whole, because, as you are doubtless aware, there are considerable districts in the south composed of chalk renowned up to the present time for their downs and mutton. But, I think, by examining carefully into the conceivable uses of chalk, we might discover a quite feasible probability of turning all the chalk districts into a limekiln, as we turn the clay districts into a brickfield. There would then remain nothing but the mountain districts to be dealt with; but, as we have not yet ascertained all the uses of clay and chalk, still less have we ascertained those of stone; and I think, by draining the useless inlets of the Cumberland, Welsh, and Scotch lakes, and turning them, with their rivers, into navigable reservoirs and canals, there would be no difficulty in working the whole of our mountain districts as a gigantic quarry of slate and granite, from which all the rest of the world might be supplied with roofing and building stone.