Although the operations at Jerusalem, besides being the more extensive, are also the more interesting in character, it may be well to look, first, at the results of Captain Wilson's expedition, and in connection with that officer's work, to consider the later labours of Warren, where they are of the same kind. First, with regard to the survey-work: it is marvellous that we have never yet had a decently correct map of the land in which all Christians are so much interested. The Admiralty have given us correct charts of the coast-line, but in the interior of the country hundreds of sites remain to be verified, and hundreds to be discovered; while the east of Jordan is almost a _terra incognita_, and the maps of it scarcely more than creations of the fancy. It is as though in England we were acquainted with but the line of the Great Northern Railway and the towns within a little distance of it on either side, and in Wales knew only the position of three or four of the principal towns. The Wilson exploring party fixed for the first time the exact latitude and longitude of nearly seventy places between Damascus and Jerusalem, determined many sites, ascertained heights, and recorded the features of the ground along which they passed. Lieutenant Warren has obtained the latitude and longitude of many scores of places, fixed the height of some hundreds, and surveyed so much ground that the committee are able to announce the map of Palestine, on the scale of one inch to the mile, as 'now approaching completion.' Much of this work was done in the dangerous country east of Jordan, where life is not safe without an escort, and the sheikh who bargains to protect you is ready to sell you to the next chieftain who thinks your friends can pay a ransom. Connected with the surveying is the settlement of topographical questions. We have seen an old book which professed to give the latitude and longitude of every place visited by the Scriptural kings, prophets and apostles, with their relative positions and distances from one another in miles. Such information, if reliable, would be of great value, for there is so close a connection between history and geography that in some cases the first cannot be understood without a knowledge of the second; and in most cases the geographical or topographical knowledge will at least assist us to realise the history.