The difference between trench warfare in winter and in summer is that between sleeping on the lawn in March and in July.  It was in the mud and winds of March that I first saw the British front.  The winds were much like the seasonal winds at home; but the Flanders mud is like no other mud, in the judgment of the British soldier.  It is mixed with glue.  When I returned to the front in June for a longer stay, the mud had become clouds of dust that trailed behind the motor-car.

In March my eagerness to see a trench was that of one from the Western prairies to get his first glimpse of the ocean.  Once I might go into a trench as often as I pleased I became “fed up” with trenches, as the British say.  They did not mean much more than an alley or a railway cutting.  One came to think of the average peaceful trench as a ditch where some men were eating marmalade and bully beef and looking across a field at some more men who were eating sausage and “K.K.” bread, each party taking care that the other did not see him.

Writers have served us trenches in every possible literary style that censorship will permit.  Whoever “tours” them is convinced that none of the descriptions published heretofore has been adequate and writes one of his own which will be final.  All agree that it is not like what they thought it was.  But, despite all the descriptions, the public still fails to visualize a trench.  You do not see a trench with your eyes so much as with your mind and imagination.  That long line where all the powers of destruction within man’s command are in deadlock has become a symbol for something which cannot be expressed by words.  No one has yet really described a shell-burst, or a flash of lightning, or Niagara Falls; and no one will ever describe a trench.  He cannot put anyone else there.  He can only be there himself.

The first time that I looked over a British parapet was in the edge of a wood.  Board walks ran across the spongy earth here and there; the doors of little shanties with earth roofs opened on to those streets, which were called Piccadilly and the Strand.  I was reminded of a pleasant prospector’s camp in Alaska.  Only, everybody was in uniform and occasionally something whished through the branches of the trees.  One looked up to see what it was and where it was going, this stray bullet, without being any wiser.

We passed along one of the walks until we came to a wall of sandbags—­simply white bags about three-quarters of the size of an ordinary pillowslip, filled with earth and laid one on top of another like bags of grain.  You stood beside a man who had a rifle laid across the top of the pile.  Of course, you did not wear a white hat or wave a handkerchief.  One does not do that when he plays hide-and-seek.

Or, if you preferred, you might look into a chip of glass, with your head wholly screened by the wall of sandbags, which got a reflection from another chip of glass above the parapet.  This is the trench periscope; the principle of all of them is the same.  They have no more variety than the fashion in knives, forks and spoons on the dinner table.