Cumberland entered upon his work energetically enough, crossed over to Flanders early in April, made all his arrangements for concentration at Brussels on the 2nd of May, and actually began his march southward on the following day.[188] Even so, however, Marshal Saxe had taken the field before him, assembling his troops in Hainault, as in the previous year, so that it was impossible to divine which of the fortresses of the barrier he might intend to attack. After a feint which pointed to the siege of Mons, he marched rapidly upon Tournay and invested it on the 30th of April, screening his movements so skilfully with his cavalry that not a word of his operations reached Cumberland until nearly a week later. Cumberland, after leaving Soignies on the 3rd of May, moved slowly south-westward by Cambron, Maulbay, and Leuse, and arrived on the evening of the 9th at Brissoel, within sight of Saxe's army. The ground immediately in front of the Allies was broken by little copses, woods, and enclosures, all of them crammed with mercenary irregular troops--Pandours, Grassins, and the like--which, imitated first from the Austrians, had by this time become a necessary part of the French as of every army. Beyond this broken ground a wide plain swept in a gentle, almost unbroken slope to the village of Fontenoy, which formed the centre of Saxe's position. The advanced parties of irregulars, together with twelve squadrons drawn up on the slope before Fontenoy, forbade Cumberland's further advance for that day, and the Allies encamped for the night. Headquarters were fixed at Maubray, a village in full sight of Fontenoy, and a bare mile and a half to the south-eastward of the French camp. [Sidenote: April 29/May 10.]