"I think, on the whole, the most interesting experience I ever had was in an ancient city on the Nile in Egypt.... When I was there a year ago, and men were digging among the ruined temples, some curious things were brought to light, and these I regard as the strangest things seen in all my wanderings. In an old tomb was found a curious iron and glass object, which on investigation proved to be a photographic camera. It was not such a camera as is used now, or has been since our photography was invented, but something analogous to it, showing that the art which we thought we had discovered was really known 6000 years ago." The same writer states that a plow constructed on the modern plan was also found. "It was not of steel but of iron, and it had the same shape, the same form of point and bend of mold board as we have now." It is reported that the dark continent possesses means of communication entirely unknown to Europe. Upon this subject a correspondent to the New York Tribune writes: "When Khartoum fell in 1885 I was in Egypt, and I well remember that the Arabs settled in the neighborhood of the pyramids knew all about it, as well as about Gen. Gordon's death, days and days before the news reached Cairo by telegraph from the Soudanese frontier. Yet Khartoum is thousands of miles distant from Cairo and the telegraph wires from the frontier were monopolized by the government." The same correspondent observes that these Arabs told him, months previously, of the defeat of the Egyptian army under Baker Pasha at Tokar--that they not only gave him the news, but several particulars concerning the matter, two full days before intelligence was received from the Red Sea coast. In answer to the suggestion that such information might have been conveyed by means of signal fires, this writer says that such fires would have attracted the attention of the English and native scouts, and that the whole country is unpropitious to such methods; besides, no system of signal fires, no matter how elaborate, could have conveyed the news so quickly and in such detail. The whole matter is summed up as follows: "The Arabs, therefore, have, manifestly, some other means of rapid communication at their command. One is inclined to the presumption that they, like the learned Pundits of Northern India, have a knowledge of the forces of Nature that are yet hidden from our most eminent scientists." Can it be that the Arabs are acquainted with the very recently discovered scientific principle, that it is possible to transmit telegraphic communications without wires, and simply by means of magnetic currents in earth and water?