Sir Charles Warren was the officer who so courageously entered the desert of Sinai after the late Egyptian war, when he succeeded in capturing the murderers of Professor Palmer, Captain Gill, and Lieutenant Sharrington, and bringing them to justice. The result of his labors in Jerusalem, and that of his fellow-explorers, is a magnificent atlas, published last year by the Palestine Exploration Fund, containing a most elaborate series of maps, plans, elevations, and engravings, which reproduce the sacred city in all its most striking features, accompanied by a handsome volume of descriptive matter. We are thus able to base an account of the ancient topography of the city on data more exact than any previously acquired, and to read the ancient historic accounts by the light of ascertained facts, instead of guessing at probabilities by the aid of descriptions, which, however carefully written, are still, as all descriptions must be, vague where the student requires most exactitude, and deficient where he most wishes for details. With the assistance of these publications a guide-book might be compiled which would enable the tourist to order his dragoman to take him straight to the places worth seeing, instead of—following on the track of exploded tradition—going with him like a sheep to those that are not. Much could be done to clear away existing confusion and prevent the perpetuation of error by a change in the received nomenclature, whereby things should be called by their right names so far as they are known, instead of by misleading appellations, derived from the records of early pilgrims or the later crusaders. I will take a few examples as illustrations. Not far from the Church of the Holy Sepulchre the guide shows the traveller an immense reservoir, now being filled up. This, he says, is the Pool of Bethesda, but it has only been thus designated since the fourteenth century. In the twelfth this pool was supposed to be a cistern near the Church of St. Anne, and in the fourth the site of Bethesda was shown at the twin pools, northwest of Antonia. The fact is that there are only two sites which may be regarded as possible for Bethesda, one being the spring of En-Rogel, which has an intermittent ebb and flow, and which is still frequented by the Jews, who bathe in it to cure various diseases. The other is the curious well immediately west of the Temple enclosure, now called Hamman Esh-Shefa, or the Healing Spring, a long reservoir reached by a shaft nearly one hundred feet deep. None of the pools which have at various times been selected by tradition have any supply of living water, and none can well be supposed to have any intermittent rise and fall, such as we understand by the moving of the waters.