Read it through once

At the end of the levee we left the mules and went in a sailboat across an arm of the Nile or an overflow, and landed where the sands of the Great Sahara left their embankment, as straight as a wall, along the verge of the alluvial plain of the river. A laborious walk in the flaming sun brought us to the foot of the great Pyramid of Cheops. It was a fairy vision no longer. It was a corrugated, unsightly mountain of stone. Each of its monstrous sides was a wide stairway which rose upward, step above step, narrowing as it went, till it tapered to a point far aloft in the air. Insect men and women--pilgrims from the Quaker City--were creeping about its dizzy perches, and one little black swarm were waving postage stamps from the airy summit--handkerchiefs will be understood.