Such a state of affairs would, if allowed to proceed unchecked, present a danger of no small degree to Great Britain and her Indian dependencies. The condition of Persia in fact, the known activity of German agents there, and probably the doubtful position of the Swedish police were factors in the decision to send a force to Mesopotamia. We shall see later how Russia, furiously engaged as she was in Poland and Galicia, and heavily attacked in the Caucasus, still found troops to march into northern Persia; and how, when the conspiracies hatched by German agents came to a head, and the police force we have already mentioned seized certain of the Persian towns and some British subjects, those Russian troops intervened in the most summary and drastic manner.

If one seeks for other reasons for the dispatch of a British force to the notoriously unhealthy valley of the Tigris, one may suggest that, in addition to combating German influence in Turkey, it was equally important to attempt to overthrow the hold which the Kaiser and his emissaries had obtained over the Young Turk Party, and through them of the Turkish nation. We may go further, seeing that the course of events proved this latter to be the case, and add that the progress of the war, and the peculiar geographical situation attached to our Russian ally, made it of paramount importance that Great Britain should engage the Turks and endeavour to break their opposition. For Russia, with its teeming millions of men, is yet not a manufacturing country, and warfare nowadays has become more or less a matter of mechanics. To raise an army, where men alone are required, is not a difficult matter where men are to be found in abundance; but, in these modern days, when arms of precision are of paramount importance in the waging of war, and when, as in the case of Russia, a country is unable herself to provide her thousands of soldiers with those weapons, it behoves her allies to send them to her. It is here that the peculiar geographical situation of the Tsar's dominions provided another serious difficulty. Southern Russia—the ports of the Crimea—is easily get-at-able at all seasons by way of the Mediterranean and the Black Sea; but close the Dardanelles—as the Turks had now done—and Russia is only approachable by way of the White Sea, or through her possessions in Asia—for the closing of the Baltic Sea may be taken as effected the moment war was declared between Germany and Russia. The result of such a closure can be easily realized if one looks at the map; for in the winter months at the opening of the campaign Russia was entirely cut off from her European allies, and could only be reached from the direction of Asia; while in the open months of the year Archangel could not be described as a port either convenient in position or of vast dimensions. Thus we arrive at another reason for attacking Turkey.

The opening of the Dardanelles, the capture of Constantinople, and the domination of the Black Sea were of vital importance to Russia, and of just as vital importance to Britain, seeing that Russia was our ally. We know, too, that, as the months rolled on, and failure to burst a road through the narrow Dardanelles by means of our battle fleet became certain, an expedition was organized to seize the Isthmus of Gallipoli, to dominate the land forts, and so clear the road to the Sea of Marmora and Russia—an expedition which, in the course of the few months it fought on the isthmus, put up a glorious record for Great Britain and her colonies, and which, if it were unfortunately wanting in success, at least proved to the world at large that the youths of our nation are not wanting in prowess.

No doubt one might suggest even further reasons for the sending of an expedition to the valley of the Tigris and Euphrates, but, as we have said already, the question is a large one, and hardly fitted for our discussion. We turn, therefore, once more, to Geoff and Philip, the two young subalterns who had already seen much adventure on the Euphrates.

"Hi! Stop! I want to talk to you," Philip sang out, as Geoff went swinging by on Sultan when the troops had covered a few miles from Basra. "What's up?"

It took Geoff quite a few minutes to pacify his fiery steed, and to quiet him down sufficiently to allow of an answer to his chum's question. For, if Geoff himself were full of energy and enthusiasm, Sultan was overflowing with spirits, the sort of spirits which caused him to rear up time and again, which sent him bounding and curvetting from side to side till the sweat dropped from his narrow shoulders; while often he would have been off at a mad gallop, perhaps right through the marching division, had it not been for the strong restraining hand which held him. In short, and in fact, Sultan had taken most kindly to the valley of the Tigris, and if his master was pleased at being one of the expedition, Sultan, had he been able to give an opinion, would have voted Mesopotamia the place above all others for himself and his master.

"What's up! Oh, well!" began Geoff, patting the neck of his charger.

"Well you needn't say it like that," Philip answered hotly. "I'm not asking for any secrets, and, besides, it would be swank on your part to try to make out that you possessed 'em. Anyone can see that something's going to happen."

"And that 'something' is a good brush with the enemy," Geoff told him. "We've had information that the Turks have come down the river and propose to attack us, and I hear that they are within only a short distance. What will it be like with shells bursting?"

Neither of the two had, so far, been actually under shell-fire, though they had watched the British ships shelling the Turkish forts at the mouth of the Shatt-el-Arab before the landing of the expedition. But the day was not to be very much older before both of them were considerably wiser, and, may we say, considerably startled. It was, indeed, but a couple of hours later that the deep note of a gun reached their ears, followed by two others, and then by the shriek of shells coming towards them. There followed a commotion within a hundred feet of the point where the two young officers were standing, a commotion which sent Sultan rearing into the air till he nearly tore away the reins which Geoff, now dismounted, had swung over his shoulder. And then a column of sand and dust was blown high, while bits of metal and gravel swept like locusts round the heads of the soldiers. Philip turned his back, and coughed, and rubbed his eyes to get rid of the grit, while Geoff fought for his breath for quite a few moments.