It is a long scar—­long and irregular.  It begins at Nieuport, on the North Sea, extends south to the region of Soissons, east to Verdun, and then irregularly southeast to the Swiss border.

The map from which I am working was coloured and marked for me by General Foch, commander of the French Army of the North, at his headquarters.  It is a little map, and so this line, which crosses empires and cuts civilisation in half, is only fourteen inches long, although it represents a battle line of over four hundred miles.  Of this the Belgian front is one-half inch, or approximately one-twenty-eighth.  The British front is a trifle more than twice as long.  All the rest of that line is red—­French.

That is the most impressive thing about the map, the length of the French line.

With the arrival of Kitchener’s army this last spring the blue portion grew somewhat.  The yellow remained as it was, for the Belgian casualties have been two-thirds of her army.  There have been many tragedies in Belgium.  That is one of them.

In the very north then, yellow; then a bit of red; below that blue; then red again in that long sweeping curve that is the French front.  Occasionally the line moves a trifle forward or back, like the shifting record of a fever chart; but in general it remains the same.  It has remained the same since the first of November.  A movement to thrust it forward in any one place is followed by a counter-attack in another place.  The reserves must be drawn off and hurried to the threatened spot.  Automatically the line straightens again.

The little map is dated the twenty-third of February.  All through the spring and summer the line has remained unchanged.  There will be no change until one side or the other begins a great offensive movement.  After that it will be a matter of the irresistible force and the immovable body, a question not of maps but of empires.

Between the confronting lines lies that tragic strip of No Man’s Land, which has been and is the scene of so much tragedy.  No Man’s Land is of fixed length but of varying width.  There are places where it is very narrow, so narrow that it is possible to throw across a hand grenade or a box of cigarettes, depending on the nearness of an officer whose business is war.  Again it is wide, so that friendly relations are impossible, and sniping becomes a pleasure as well as an art.

It was No Man’s Land that I was to visit the night of the entry in my journal.

From the neighbourhood of Ypres to the Swiss border No Man’s Land varies.  The swamps and flat ground give way to more rolling country, and this to hills.  But in the north No Man’s Land is a series of shallow lakes, lying in flat, unprotected country.

For Belgium, in desperation, last October opened the sluices and let in the sea.  It crept in steadily, each high tide advancing the flood farther.  It followed the lines of canal and irrigation ditches mile after mile till it had got as far south as Ypres, beyond Ypres indeed.  To the encroachment of the sea was added the flooding resulting from an abnormally rainy winter.  Ordinarily the ditches have carried off the rain; now even where the inundation does not reach it lies in great ponds.  Belgium’s fertile sugar-beet fields are under salt water.