Juba's finger was directed to a spot where, amid the thick foliage, the gleam of a pool or of a marsh was visible. The various waters round about, issuing from the gravel, or drained from the nightly damps, had run into a hollow, filled with the decaying vegetation of former years. Its banks were bordered with a deep, broad layer of mud, a transition substance between the rich vegetable matter which it once had been, and the multitudinous world of insect life which it was becoming. A cloud or mist at this time was hanging over it, high in air. A harsh and shrill sound, a whizzing or a chirping, proceeded from that cloud to the ear of the attentive listener. What these indications portended was plain.... The plague of locusts, one of the most awful visitations to which the countries included in the Roman empire were exposed, extended from the Atlantic to Ethiopia, from Arabia to India, and from the Nile and Red Sea to Greece and the north of Asia Minor. Instances are recorded in history of clouds of the devastating insect crossing the Black Sea to Poland, and the Mediterranean to Lombardy. It is as numerous in its species as it is wide in its range of territory. Brood follows brood, with a sort of family likeness, yet with distinct attributes. It wakens into existence and activity as early as the month of March; but instances are not wanting, as in our present history, of its appearance as late as June. Even one flight comprises myriads upon myriads passing imagination, to which the drops of rain or the sands of the sea are the only fit comparison; and hence it is almost a proverbial mode of expression in the East, by way of describing a vast invading army, to liken it to the locusts. So dense are they, when upon the wing, that it is no exaggeration to say that they hide the sun, from which circumstance indeed their name in Arabic is derived. And so ubiquitous are they when they have alighted on the earth, that they simply cover or clothe its surface.