The Ypres Salient, as we came to know it, is essentially the ground north and south of the twelve miles of road running from Ypres to Menin. Ypres itself is about 65 feet above sea-level, and Menin (on the Lys) about 35 feet. But the ground between them rises to over 200 feet at "Clapham Junction" (three miles from Ypres) and remains approximately at the same level for the two miles farther to Gheluvelt. This higher ground circles round to the south-west (through Hill 60) until it joins Wytschaete (eight miles south of Ypres) and the Messines Ridge. To the north it continues from Gheluvelt by Broodseinde, between Becelaere and Zonnebeke, to the Passchendaele Ridge (180 feet), some seven miles north-east of Ypres. The unfortunate city was therefore not only at the centre of a very narrow salient, but one in which it was encircled by higher ground on three sides within easy observation and shelling range. For a long time, until our advance in 1917, the German lines were only distant two and a half miles north, east, and south from the city, and everywhere were on levels sufficiently above that of the city to keep it always under observation. It would have been cold comfort to our poor fellows who had to face the horrors of the Flanders mud to know that three centuries ago a traveller wrote: "Near Ypres they found the road often indistinguishable from the fields, and the mud came up to their horses' girths."[9] [9] Bates, "Touring in 1600," p. 287. But in fact the physical difficulties due to the nature of the soil, churned up by shells on every square yard, were so horrible that Lord Haig (who is certainly not given to exaggeration in his despatches) says of the 1917 advance:[10] [10] Haig's Despatches, vol. i., p. 133. "Our men advanced every time with absolute confidence in their power to overcome the enemy, even though they had sometimes to struggle through mud up to their waists to reach him. So long as they could reach him they did overcome him, but physical exhaustion placed narrow limits on the depth to which each advance could be pushed, and compelled long pauses between the advances.... Time after time the practically beaten enemy was enabled to reorganise and relieve his men and to bring up reinforcements behind the sea of mud which constituted his main protection." The statement made that "nine-tenths of the time our men were fighting Nature, and the remainder fighting Germans," cannot be much exaggerated.