We have already said that it had been in contemplation to extend our journey farther to the eastward, and to examine the country between that place and Alexandria, in which it seemed probable that interesting remains might be found. We had in that event proposed to return by Siwah, and along the track of Horneman to Augila; from which place we should have re-entered the Greater Syrtis, and explored some of the more inland parts of it in the course of our journey back to Tripoly. Circumstances, however, which it will not here be necessary to explain, prevented our going farther eastward than Derna, and limited the period of our stay in the Pentapolis to a much shorter period than we had originally calculated upon. Our work has in consequence assumed the form of a Journal, and has become more contracted on points of unquestionable interest, and more diffuse in matters which would otherwise have been omitted, than it would have been in the character which we wished it to have taken. We do not, however, mean to apologize for having done less than we might have done under the circumstances in which we were placed; or to underrate the value of the matter which we have been able to lay before the Public: the materials which we had to work upon are in themselves sufficiently interesting to call for the attention of those who read for information, and the labour which has been employed in collecting them (during the whole course of a long and fatiguing journey) has not been thrown away upon trifles. We have given to the world (we may say with the greatest accuracy) an extensive tract of coast which has been hitherto unsurveyed, and of which our best charts afforded a very imperfect outline, as will appear by a reference to the maps at the head of the work.