So fully did J. R. Booth post himself on the practical details of logging and lumbering, so securely did he lay the foundations of every fresh extension of his enterprise, that, of all the forest properties in the world, his became the largest. Mr. Paul E. Bilkey put the case comprehensively when he wrote: “Rivers, streams big and little, snow-covered forest tracks, roads that are good and roads that are bad and roads that are no roads at all, lead ultimately to the coffers of J. R. Booth; veins and arteries stretching over two great provinces and an American State, parts of or tributaries to a great industrial system whose heart pulsates day and night at the Chaudière, to the uttermost agency devised and dominated by the genius of one man—Booth.” And again: “The river is bitted and broken to do the work that Booth requires it to do: turns the wheels of his mills, takes the logs and timbers down through his slides, floats his noisy tugs and carries his booms; and Booth, to keep it all going, draws upon a timber empire in the north which, if strung out in a line a mile wide, would stretch from Quebec to Victoria.” Thus to measure the scope of this colossal enterprise your imagination must first roam over large areas of Ontario and Quebec, and then (J. R. Booth having felt cramped in a little place like Canada) take cognisance of great slices of the United States. But it is easier to find the limits of the business than of the brain that controls it. Of that brain, the more obvious feature is its organising power. For J. R. Booth is the sole and actual head of the vast concern. It is not run by a syndicate or a company. He easily and successfully carries a burden of mental responsibility, and exercises a volume of mental control, that would suffice to keep half a dozen boards of directors out of mischief. But the most remarkable feature of this brain, I think, is its capacity for detail. It is not only a mental telescope that sees things too large for ordinary vision; it is a mental microscope that detects minutiæ invisible to most men. I will give two illustrations.