The first part of the intended journey, which Mr. Burckhardt here announces, was performed to the exact amount of his expectations, but his “lateral excursion into the Nubian desert” was much more extensive than his most sanguine hopes had anticipated, for he succeeded in penetrating to the banks of the Astaboras; and from thence crossed the desert to Souakin on the shore of the Red Sea. This and the former journey along the Nile towards Dóngola, were the only travels in the unexplored regions of the interior of Africa, which he was destined to accomplish, but they led to a tour in Arabia, which was productive of information not less interesting, and scarcely less original than that which he collected in his Nubian journeys. No less than two years and an half were spent in these travels, and in a long residence in Upper Egypt, during the interval which occurred between his two Nubian journeys; but no opportunity of forwarding the main object, of penetrating into the interior of Africa in the intended direction, was lost by the delay, as no caravan departed from Egypt to the westward during the whole period of his absence from Cairo. As Mr. Burckhardt’s description of his two journeys to Nubia forms the subject of the present volume, it will be unnecessary to detain the reader with the outline or abridgement of them, which his letters contained: it will be sufficient to insert a few extracts from those letters, for the sake of connecting the several occurrences of his travels in their order of time. The first letter which the Association received from their traveller; after his departure from Cairo, was dated from Esne, in Upper Egypt, soon after his return from his first journey into Nubia. _Extract of a letter from Esne, May 2nd,_ 1813.