For the making of the pyramid itself there passed a period of 20 years; and the pyramid is square, each side measuring 800 feet, and the height of it is the same. It is built of stone smoothed and fitted together in the most perfect manner, not one of the stones being less than 30 feet in length. This pyramid was made after the manner of steps, which some call 'rows' and others 'bases': When they had first made it thus, they raised the remaining stones with devices made of short pieces of timber, lifting them first from the ground to the first stage of the steps, and when the stone got up to this it was placed upon another machine standing on the first stage, and so from this it was drawn to the second upon another machine; for as many as were the courses of the steps, so many machines there were also, or perhaps they transferred one and the same machine, made so as easily to be carried, to each stage successively, in order that they might take up the stones; for let it be told in both ways, according as it is reported. However, that may be, the highest parts of it were finished first, and afterwards they proceeded to finish that which came next to them, and lastly they finished the parts of it near the ground and the lowest ranges.