With the completion of the surveys of Baluchistan and Makran much light has also been thrown on the ancient connexion between east and west; and the final settlement of the southern galuch- boundaries of Afghanistan has led to the reopening of istan and one at least of the old trade routes between Seistan Makran.
In Arabia progress has been slower, although the surveys carried out by Colonel Wahab in connexion with the boundary determined in the Aden hinterland added more exact geographical Arabia.
Of scientific geographical exploration in Asia (beyond the limits of actual surveys) the modern period has been so prolific that it is only possible to refer in barest outline to some of the principal Indian expeditions, most of which have been directed either to explorers.
The result of trans-border surveys to the north and west of India has been to establish the important geographical fact that it is by two gateways only, one on the north-west and one on the west of India, that the central Asiatic tides of immigration have flowed into the peninsula.
After a highly useful career, under the presidency till 1813 of Sir John Sinclair, the Board of Agriculture was dissolved in 1819, but left in its statistical account, county surveys and other documents much interesting and valuable information regarding the agriculture of the period.