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 people bought and sold. The one commodity that labor had to sell was muscle. The honor of labor had no price in the market-place. Labor had muscle, and muscle alone, to sell.

But there was a difference, a vital difference. Shoes and trust and honor had a way of renewing themselves. They were imperishable stocks. Muscle, on the other hand, did not renew. As the shoe merchant sold shoes, he continued to replenish his stock. But there was no way of replenishing the laborer's stock of muscle. The more he sold of his muscle, the less of it remained to him. It was his one commodity, and each day his stock of it diminished. In the end, if he did not die before, he sold out and put up his shutters. He was a muscle bankrupt, and nothing remained to him but to go down into the cellar of society and perish miserably.

I learned, further, that brain was likewise a commodity. It, too, was different from muscle. A brain seller was only at his prime when he was fifty or sixty years old, and his wares were fetching higher prices than ever. But a laborer was worked out or broken down at forty-five or fifty. I had