Nothing was studied more carefully than the provision of food, water, ammunition, and stores for the advancing troops. In front of the huge divisional dumps at Lindenhoek cross-roads and "Daylight Corner," on the Lindenhoek-Neuve Eglise Road, there were an advance dump, a dump for each of the attacking brigades, six battalion dumps, and many smaller in the trenches. An elaborate system of pack transport was devised, two hundred extra pack-saddles with special crates attached being issued. Two hundred and fifty "Yukon packs"--a Canadian device which enabled a man trained in its use to carry a very heavy load--were also issued. Arrangements were made to serve in the trenches a hot meal at midnight prior to the assault. A special ration of oranges, Oxo cubes, chewing gum, and lime juice was issued to every man, and a tin of solidified alcohol for cooking to every fourth man. Means of communication, by visual signalling, pigeons, wireless, the fullerphone, runners, and the rocket for S.O.S. calls, were worked out in detail. For the fullerphone there were two lines of buried cables, with cable-heads in our front line trenches. Forward stations were selected in the enemy's line at Spanbroekmolen and Peckham, to which armoured lines were to be laid across "No Man's Land," from the cable-heads, by the brigade forward parties. As soon as the final objective was reached, these forward stations were to move to the crest of the ridge. Working independently of this machinery, which was in the hands of the Signal Service, were the brigade and battalion intelligence sections, the former of which were to establish observation posts at Spanbroekmolen and Peckham, while the latter moved up behind their battalions, selected observation posts to follow their movements and cover their final position, and sent out scouts to obtain touch with flanking battalions and bring information as to their progress. For visual signalling a divisional signal station was established on Kemmel Hill, which had a clear line to the brigade forward stations, so that messages could be sent either forward or back by the Lucas lamp. The Second Army was to attack the Messines-Wytschaete Ridge, and the ground east of it as far as the Oosttaverne line.[31] The IX. Corps was allotted from the Wulverghem-Wytschaete Road to the Diependaal Beek, a distance of six thousand four hundred yards along the front line of the enemy's salient. It was to attack with three divisions in line: from right to left the 36th (Ulster) Division, the 16th (Irish) Division, and the 19th (Western) Division. These troops were to advance to the Black Line, east of the Messines-Wytschaete Road, after which the 11th Division, in Corps Reserve, was to pass through to the final objective. A glance at the map will show how the frontage of attack narrowed with every thousand yards of the advance. On the right of the 36th Division was the 25th, in the II. Anzac Corps.