It appeared that the artillery observers had decided that the Germans were registering, and a sketch map that was produced showed the area which it was presumed they intended to raid. Colonel Bates, of the 2/5th South Lancashire Regiment, was rather contemptuous of the whole thing, and ascribed the apparent registration to mere casual shooting on various targets. But, at any rate, the matter had to be attended to, although the expected raid never took place. The line was held with three companies in the front and support lines, and two in the subsidiary line, the additional company being supplied by another battalion. The total frontage was about 2,800 yards, and to cover this a system of "gaps" and "localities" had been arranged--_i.e._, a series of posts covering vital points of the line. The "gaps" were ordinary but unoccupied trenches, often derelict; but they were usually wired and made difficult to penetrate. Before leaving the 2/5th South Lancashire Regiment we were introduced to Major Brookes, M.C., A/286 Battery R.F.A., and from that moment commenced a long and lasting friendship with a most gallant and capable officer in whom every man (and all knew him) placed the utmost confidence. In the trying days ahead in Houplines at its worst Major Brookes was daily round the line; and though his battery was continually shelled by guns of every calibre, he always managed to do all we asked him, and never failed to let the enemy have even more than his daily quota of 18-pounder shells. At 8 p.m. on March 28th Lieutenant F. C. Bowring, Sergeant Machell, and the company Lewis gunners set off for the trenches. In view of a possible hostile raid, it was thought advisable that they should relieve in daylight, and be in a position to make their presence really felt on the relief night in the event of the Germans choosing that time for a raid. The route to be taken was viâ Erquinghem, Armentières, and Rue Marle Level Crossings, and then straight down past Crown Prince House to the subsidiary line, where they were to spend the night, taking over their posts at dawn the following day.