From this brief description you will clearly understand that East Prussia is neither a rich nor a very attractive country; yet it is the very apple of the Prussian eye. You will remember that it was stolen from Poland by Frederick the Great in 1772. When he was only Elector of Brandenburg he was King of East Prussia. Königsberg, which you will find near the mouth of the Pregel, was the first capital of the kings of Prussia, and to them it is almost a sacred city. They still have a residence in Königsberg, and are still crowned[32] in its cathedral. Every year the victory of Sedan is celebrated in Königsberg with great rejoicings. Most of the great Prussian families who have given their sons to the Prussian army have estates in East Prussia, where they are lords of the soil. Their farm-servants, though supposed to be free, are really their serfs, and are kept down with a heavy hand. The Kaiser and his nobles regard East Prussia as the very citadel of their power, and to lose it would be their ruin. [Illustration: Insterburg. _Photo, Exclusive News Agency._] From what has been said about East Prussia you would suppose it to be the last region in which the Russians would willingly fight battles. Why, then, did they invade it? I think for two reasons. First, because they could push into it very rapidly; and, secondly, because they knew that, immediately it was attacked, the Germans must come to its rescue. You know that the German General Staff believed that six weeks at least would elapse before the Russian mobilization could be completed. In that time they hoped to beat France so thoroughly that a few army corps would be sufficient to hold her down. Then they meant to swing their victorious troops to the eastern theatre of war, and overwhelm the Russians in the same way. Such was their calculation; but, like so many of their calculations, it went all wrong. The Russians mobilized in sixteen days, and they had sufficient troops ready for the field on 3rd August, less than three days after the declaration of war. They could not send these troops against the western Polish front, because they were not strong enough in numbers, and they were then by no means sure that the Poles would not rise against them. They could, however, fling them into East Prussia, which was, as it were, on their doorstep. This they did, and though the invasion finally ended in defeat, it served a good purpose, for the Germans had to withdraw a number of their army corps from France and hurry them eastward to defend their beloved East Prussia. The Belgians by their gallant fight had upset the German programme; the withdrawal of these corps from the western front played further havoc with it, and no doubt did much to save France. [Illustration: Russian Troops entraining for the Frontier. _Photo, Record Press._]