To one who had visited the country, and, more than all, to one who had accompanied the studious Major Joseph Douglas, there was no difficulty in drawing a map which showed all the essential points in Mesopotamia. It was not exactly Geoff's fault that he knew a great deal about the country. Thanks to the tuition of his kindly guardian, and the long discussions which that officer had so frequently indulged in, Geoff had contrived to visit Mesopotamia and live there, not as an ordinary tourist might have done, but as an explorer. Brought into the closest contact with the Turk, the Persian, the Armenian, and the Jew, it was only natural that, with his guardian's help, he should have learnt something of the international situation as it concerned Turkey. A visit to Constantinople had shown him the more civilized side of the country, while the outbreak of the war between the Balkan Powers and Turkey, and the dissertations of Major Joe Douglas, had familiarized him more or less with the situation of Turkey in Europe. "Of course, there is the 'pipe' line," he told his listeners, "and, going by what Major Douglas has always told me, it cannot fail to be of great importance to Britain. You see, numbers of our battleships now use oil fuel almost exclusively." "Quite so! That's got it!" chimed in the senior officer. "You've hit the nail on the head, Geoff. Go ahead!" "So an expedition to the head of the Persian Gulf may very well be for the sole purpose of protecting the oil-supply of the British Navy. As to why the Expedition should come from India rather than from England, I can say that anyone--any white man that is--who has been to Mesopotamia will know that it's a beast of a climate. As hot as India in the plains in the hot weather, and often enough, when the cold season comes along, bitterly cold and wet. But for the most part it is hot, and damp, and trying, so that native troops are far more suitable. There's the 'pipe' line," he told his listeners, sketching in a line from the southern border of Persia. "It strikes across the desert to the east of the River Karun, and joins up with the Shatt-el-Arab, close to a place called Mohammera. I ought to explain that the Rivers Tigris and Euphrates join up somewhere in the region of Kurnah and Basra, and then flow on, picking up the River Karun and opening into the Persian Gulf some twenty miles farther down. As to Turks, of course the bulk of them are up country, particularly in the neighbourhood of Bagdad. But there are fortified posts along both rivers and right down to the mouth of the Shatt-el-Arab. At Basra there are quite a considerable number of Europeans and Indians, and they tell me that an increasing trade is done from that port. If we land somewhere about there we are sure to be opposed, and if there weren't any Turks there are any number of Arabs, some of whom, at least, are likely to be unfriendly." "So that there'll be fighting, eh?" asked the senior officer.