Haifa, August 3.—The discoveries which have been made in Jerusalem during the last few years, and the conclusions at which those who have most deeply studied the subject have arrived in consequence, render it extremely desirable that a new or revised description of the Holy City should be inserted in the tourists' hand-books for Syria and Palestine. Travellers should be warned against dragomans who waste their time taking them to see Christian sites which have no relation to the facts they are supposed to commemorate, and possess no interest of any kind beyond the philosophical one that they illustrate the extraordinary credulity and superstitions which exist among the professors of Christianity in the nineteenth century, and which are certainly not exceeded, even if they are paralleled, by those of any heathen religion. A Jerusalem hand-book, to be of any interest, should deal with the conclusions resulting from the excavations and researches of Sir Charles Wilson, Sir Charles Warren, Captain Condor, M. Clermont Ganneau, and others, during the last twenty years, and leave the traditions of the Latin and Greek churches almost out of the question altogether. Their researches have settled nearly all the topographical questions connected with ancient Jerusalem, which had previously been the subject of so much controversy and error, the doubts and difficulties connected with them arising from the fact that the city had been more or less destroyed and built over so many times that the original foundations of its walls and Temple could only be determined by extensive and laborious excavations; and in the course of these many collateral discoveries were made. We learn from the publications of the Palestine Exploration Fund that these excavations were carried on under difficulties of every kind, in face of the opposition of the local government and in spite of continued fevers and lack of funds. The mines were driven to extraordinary depths; one at the southeast angle of the Haram being eighty feet deep, and another, near the northeast angle, being one hundred and twenty feet beneath the surface, where it reaches the solid rock. In consequence of the great depths, the scarcity of the mining frames, and the treacherous character of the débris through which the shafts and galleries were driven, the work was one of unusual danger and difficulty, requiring much courage and determination. Sir Charles Warren and the non-commissioned officers of his staff worked constantly with their lives in their hands, and often undertook operations from which the native workmen recoiled. The prudence and discipline of the party, however, secured valuable discoveries without an accident; and it is generally acknowledged that the results are of an importance which fully repays the labor and difficulty of the operations.