“The river Luce, though only a small marshy stream, formed _the_ great difficulty of the plan of operations. “Part of it was in the French lines, and as to put up fresh bridges would have attracted the enemy’s attention, the attacking troops had to cross it in a few places and deploy afterwards in the dark. “In that sector where the Luce flowed within the enemy’s lines, it ran diagonally across the front of attack of the Canadian Division. “A great deal of trouble was taken in finding out all possible details of this little river, and it caused anxiety to every one concerned from the Field-Marshal himself downwards. “The Luce sector of the front lay within the lines then held by the French, and in addition to various Reconnaissance Officers, Major-General Lipsett, commanding the 3rd Canadian Division, and Brig.-General Hankey, commanding the 4th Tank Brigade, carried out personal reconnaissance of the river in general and Domarat Bridge in particular. “Both these General Officers had great reputations for personal gallantry, and always endeavoured to see for themselves what the conditions really were before committing their troops. “The French troops then holding the line, knowing nothing beyond the fact that they were to be relieved by the British, expressed the greatest astonishment and admiration for our thoroughness and for the remarkable conscientiousness and pertinacity of our Generals and General Staff Officers, in so frequently visiting the forward positions of an unhealthy sector. We had no choice but blandly to assure them that this was their unvarying practice whenever a relief of any sort was contemplated.” As another result of the great secrecy that had been imposed, no officer knew who else was in the secret, and on one occasion Major Hotblack and another British officer met on the banks of the Luce and each made lengthy explanations which explained everything except the real reason why they were there. Two days later these officers met at a conference on the operations, and congratulated each other on the plausibility of their several explanations. It had been no easy matter to pretend that it was quite a normal thing for them to paddle in the Luce in close proximity to the enemy. On the day all went well, however, and the information about the river proved to be correct to the last detail, and as had been anticipated, though the bridges in the enemy lines had been blown up, the gaps were sufficiently small for Tanks to cross on the abutments. Generally speaking, the going was good, and the fact that the weather had been reasonably fine for some time before the day of attack made our preparations the easier. All night, for four or five nights before the battle, the carrying Tanks had plied up and down, forming dumps of tens of thousands of gallons of petrol and water and millions of rounds of ammunition.