[Illustration: The Suez Canal and the Sinai District.] You will notice that before the Turks could set foot in Egypt they would have to cross the Suez Canal, which could not be turned, because it runs from sea to sea. If the Turks could seize the Suez Canal they would command our short route to India, and would be able to impede greatly the bringing of troops to Europe from the East. No doubt this was another of the reasons which led the Turks to make a descent upon Egypt. So important is the Suez Canal to the defence of the country that I must briefly describe it. The canal is nearly 100 miles long--76 miles of it actual canal, and 24 miles of dredged and buoyed waterway through lakes. In all this length there is not a single lock! The canal varies in width from 80 to 120 yards, and it is deep enough to float the heaviest of Dreadnoughts. Begun in 1859, it was completed ten years later, at a cost of £16,000,000. It is not the property of any one nation, but the United Kingdom is by far the largest shareholder: it holds 35 per cent. of the shares. Let us follow the course of the canal. For the first few hours the canal crosses the shallow arm of the Mediterranean known as Lake Menzala. Two long parallel embankments cross this so-called lake, which is very shallow, and is studded with rocks. When this section is passed, we have the red sands of the desert to right and left of us. Side by side with the canal runs a sweet-water canal. It is a simple ditch, and its course can everywhere be traced by the grass and trees which flourish along its margin. Except for this fringe of verdure, no vegetation but desert scrub can be seen. At the station of El Kantara there is a ferry, and here one may sometimes see caravans of Arabs with laden camels setting out on a journey across the desert to El Arish. Later in the day we cross Lake Balâh, pursuing our way between rows of buoys. Another stretch of canal follows, and we cross Lake Timseh, and see away on our right the town of Ismailia, from which a railway strikes off westwards. Then comes another long, straight channel, with high sand dunes on the left bank. We pass the signal station of Toussûm, set in a pleasing frame of trees, and two and a half miles further on is Serapeum. We now steam across the Bitter Lakes, which are said to represent an old arm of the Red Sea. After these lakes are passed we enter the last stretch of the canal, and finally reach Suez, beyond which lies the Red Sea.