It however, appeared necessary (without taking the purely scientific labours into account), to lay before a larger circle of readers a picture of the external events of the expedition, of the relative operations of its members, of the obstacles, and the favourable circumstances of the journey, the condition of the countries through which it passed, and their effect upon the actual design of the undertaking; finally to offer a few observations on the remarkable monuments of that most historical of all countries, as must continually recur to the well prepared traveller, and which might rouse others who have already perceived the importance of the newly founded science, to a more active interest. If, besides, it be of the greatest utility for a just understanding of these scientific labours which are gradually coming to the light, and which have been caused by the journey; that the circumstances under which the materials for them were collected, I think that the publication of the following letters requires no farther excuse, as they make no pretension to any particular literary perfection, or descriptive power, or, on the other hand, to be a strictly scientific work. The letters are almost in the original form as they were written, sometimes as a report direct to his Majesty the King, sometimes to his Excellency, the then Minister of Instruction, Eichhorn, or to other high patrons and honoured men, as A. Von Humboldt, Bunsen, Von Olfers, Ehrenberg, and sometimes to my father, who followed my progress with the most lively interest. Several of them were immediately printed in the papers on their arrival in Europe, particularly in the _Preussische Staatszeitung_, and thence in other papers. The unessential changes mostly relate to the editing. All the additions or enlargements have been added as notes; and among these belong particularly the arguments and grounds as to the true position of Sinai, which, since then has been proved in various quarters, and again disproved, and again concurred in. The thirty-sixth letter, on the arrangement of the Egyptian Museum in Berlin, turns certainly from the subject; but we may allow the exception, as this point is not alone interesting to Berlin, but in all points the examination is worth while, where there is any resemblance to or comparison with modern art. It is proposed to add a second part to these letters, in which several treatises, written during the expedition, or on different points relating to Egyptian art or history, will be published. BERLIN, _2nd June, 1852_. CONTENTS. LETTER I.--ON BOARD THE ORIENTAL STEAMER, SEPT. 5, 1842 Page 1 Sea voyage to Alexandria. LETTER II.--ALEXANDRIA, SEPT. 23, 1842 6 Malta.--Gobat.--Isenberg.--Krapf.--Alexandria.--Mohammed Ali. LETTER III.--CAIRO, OCT. 16, 1842 11