A British corps does not allow itself to be driven without hitting back, however great the odds may seem. A series of brisk skirmishes was going on all along the line. In one of these, just south of Ham, Colonel Watson with the 17th King's Liverpools came back on his pursuers and held them up for a time. More serious was the counter-attack organised by the main body north of Esmery-Hallon. This attack struck southwards from Canizy and hit upon the right flank of the Germans, staggering them for the instant. It was carried out by the 60th Brigade and the 182nd Brigade, all under General Duncan of the {162} former unit. This spirited advance was led upon the field by Colonel Bilton of the Sixty-first Division, and was delivered with such force that this small British detachment drove back for some distance the great army which was rolling westwards. It was impossible, of course, to recover ground permanently, but it gained invaluable time and eased the pressure upon the south end of the line for the whole of a critical evening. It was clear, however, that the capture of Ham and the crossing of the stream had turned the flank of the Twentieth and Sixty-first Divisions, who were defending the higher reaches of the same river. They were not to be frightened prematurely out of their positions, however, and at Bethencourt the 11th Rifle Brigade drove back a German attempt at crossing, while at Offoy the 12th Rifles also inflicted a sharp repulse upon the pursuers. That evening, March 23, the Sixty-first Division was practically amalgamated with the Twentieth, and both were concentrated near Nesle. They received at this time a most useful reinforcement in the shape of two batteries (16 guns) of Canadian motor machine-guns under Captain Meerling. There is not an officer or man of these much-tried battalions who would not admit a deep debt of gratitude to these splendidly efficient and energetic guns, which had such mobility that they were always where they were most wanted. [Sidenote: March 24.]