This is a quote from the book "Animal Farm" by George Orwell
...he rope — even the pigs sometimes joined in at critical moments — they dragged them with desperate slowness up the slope to the top of the quarry, where they were toppled over the edge, to shatter to pieces below. Transporting the stone when it was once broken was comparatively simple. The horses carried it off in cart-loads, the sheep dragged single blocks, even Muriel and Benjamin yoked themselv es into an old governess-cart and did their share. By late summer a sufficient store of stone had accumulated, and then the building began, under the superintendence of the pigs.

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