A large patch of undergrowth, cut in rotation, called the Wood of Bossu, ran along the high road from Frasnes and Charleroi, flanking that road to the west, and forming cover for troops that might wish to forbid access along it. The ground falls somewhat rapidly in front of the cross-roads to a little stream, and just where the stream crosses the road is the walled farm of Gemioncourt, which can be held as an advanced position, while in front of the fields where the Wood of Bossu once stood is the group of farm buildings called Pierrepont. Finally, that arm of the cross-roads which overlooks the slope down to Gemioncourt ran partly on an embankment which could be used for defence as a ready-made earthwork.
Now, let us see what troops were actually present that Friday morning upon the allied side to defend this position against Ney’s advance, and what others were near enough in the neighbourhood to come up in defence of the position during the struggle.
There was but one division of the Allies actually on the spot. This was the Netherlands division, commanded by Perponcher; and the whole of it, including gunners and sappers (it had hardly any cavalry[8] with it), was less than 8000 strong. It was a very small number to hold the extended position which the division at once proceeded to occupy. They had to cover a front of over 3000 yards, not far short of two miles.
They did not know, indeed, what Ney was bringing up against them; Wellington himself, later on, greatly underestimated the French forces on that day. Now even if Ney had had far less men than he had, it was none the less a very risky thing to disperse the division as Perponcher did, especially with no more than fourteen guns to support him,[9] but under the circumstances it turned out to be a wise risk to have taken. Ney had hesitated already, and was in a mood to be surprised at any serious resistance. The more extended the veil that was drawn before him, the better for the Allies and their card of delay. For everything depended upon time. Ney, as will be seen, had thrown away his chance of victory by his extreme dilatoriness, and during the day the Allies were to bring up unit after unit, until by nightfall nearly 40,000 men not only held Quatre Bras successfully, but pushed the French back from their attack upon it.
Perponcher, then, put a battalion and five guns in front of Gemioncourt, another battalion inside the walls of the farm, four battalions and a mounted battery before the Wood of Bossu and the farm of Pierrepont. Most of his battalions were thus stretched in front of the position of Quatre Bras, the actual Cross Roads where he left only two as a reserve.
Against the Dutchmen, thus extended, the French order to advance was given, and somewhere between half-past two and a quarter to three the French attack began. It was delivered upon Gemioncourt and the fields to the right or east of the Brussels road.
The action that followed is one simple enough to understand by description, but difficult to express upon a map. It is difficult to express upon a map because it consisted in the repeated attack of one fixed number of men against an increasing number of men.
Ney was hammering all that afternoon with a French force which soon reached its maximum. The position against which he was hammering, though held at first by a force greatly inferior to his own, began immediately afterwards to receive reinforcement after reinforcement, until at the close of the action the defenders were vastly superior in numbers to the attackers.
I have attempted in the rough pen sketch opposite this page to express this state of affairs on the allied side during the battle by marking in successive degrees of shading the bodies of the defence in the order in which they came up, but the reader must remember the factor of time, and how all day long Wellington’s command at Quatre Bras kept on swelling and swelling by driblets, as the units marched in at a hurried summons from various points behind the battlefield. This gradual reinforcement of the defence gives all its character to the action.