The excursion to Mount Sinai was the last journey which Mr. Burckhardt accomplished. From the time of his return to Cairo in June 1816, to that of his death in October 1817, he continued to reside in the Egyptian capital, occupied in preparing various papers for the Association; and in other employments connected with Arabic literature, and his travelling pursuits. The letters which he addressed during this period to the Committee, shew how deeply he felt the disappointment, caused by the non-arrival of any caravan from the interior, by the return of which, he might have proceeded upon the ultimate object of his mission. His letters contain also a series of valuable observations upon the events which occurred about that time in Egypt and Arabia, together with many remarks upon the manners and government of Egypt, and upon those subjects which were his principal objects of enquiry, as an agent of the African Association. The remarks of a person who unites good sense and judgment to local knowledge and experience, are of the highest value in countries where every branch of enquiry presents results so different from our preconceived notions, founded upon what we have been accustomed to in Europe; where accurate information is very difficult to acquire; and where, consequently, the remarks of the transient traveller are often replete with error. These considerations are a sufficient excuse for laying before the reader the most interesting parts of the last epistolary communications of Mr. Burckhardt to the Association. They are contained in the following extract from his letters, all of which, except the last, are addressed to Mr. Hamilton, the Secretary. _Cairo, October 15th,_ 1816. I have the honour of transmitting to the Committee of the African Association some papers, forming part of the information obtained by me, during my journey through Arabia. They consist of, 1st. Some further fragments on the Bedouins of Arabia, in sequel to those forwarded on former occasions. 2nd. A history of the Wahabi, and principally of Mohammed Aly’s late campaign in the Hedjaz. 3rd. A few notes to my former journals.