Horneman names all the towns within the territory of Siwah,—_Scharkie_, _Msellem_, _Menschie_, _Sbocka_, and _Barischa_, and he places all these villages, or towns, within _one or two miles_ of Siwah the capital, which proximity could not be the case, if the rich and fertile land extended each way sixteen miles in traverse, as a circle of fifty miles implies. On a small and most fertile tract of country, surrounded on all sides by barren and sandy deserts, the rich and productive soil infers a population commensurate with, and in proportion to, its extent. Diodorus Siculus tells us, that the ancient Ammonians dwelt κωμηδὸν, _i. e._ vicatìm. (Ed. Wesseling, Tom. II. p. 198.) And so too the people at present (on grounds probably of convenience and defence against the Arabs of the Desert) appear to live chiefly in towns; and hence those towns must have been more distant, as more widely diffused over so great a space of country from its very character and description, to be supposed in every part occupied and appropriate. Society must have gathered and increased till it fully covered a country of such _exclusive_ fertility and means of subsistence. Generally, increase of population is to be measured by the means of subsistence; and in converse of the proposition, whatever of country was productive and habitable situated as the Oasis of Siwah, must be considered as inhabited and turned to account: the general reasoning and estimate of increase of people is further strengthened by the special argument of probable resort, from the barren yet partially inhabited districts which encompassed it. Horneman’s description of the territory of Siwah tallies with, and confirms, the speculation: he represents the country as consisting of so many gardens walled or fenced on every side, and cultivated with so nice attention and labour, and with such care in irrigation, that the water directed in various cuts and channels from each spring, was in no case suffered to flow beyond the territory; but was made to lose and expend itself in the cultivated grounds of the Siwahans: and he describes the people as a swarm, and their residence as a crowded hive. Let us now advert to his more particular enumeration of these Siwahans, and to the practicability of such number (as under any computation can be supposed labourers in the field) being competent to work the ground of fifty miles in circuit, with the nice agriculture he describes.