Perhaps if I had published this tale, which I have had for a long time in my mind, under the title of First Command, no suggestion of the Supernatural would have been found in it by any impartial reader, critical or otherwise. I will not consider here the origins of the feeling in which its actual title, The Shadow-Line, occurred to my mind. Primarily the aim of this piece of writing was the presentation of certain facts which certainly were associated with the change from youth, carefree and fervent, to the more self-conscious and more poignant period of maturer life. Nobody can doubt that before the supreme trial of a whole generation I had an acute consciousness of the minute and insignificant character of my own obscure experience. There could be no question here of any parallelism. That notion never entered my head. But there was a feeling of identity, though with an enormous difference of scale--as of one single drop measured against the bitter and stormy immensity of an ocean. And this was very natural too. For when we begin to meditate on the meaning of our own past it seems to fill all the world in its profundity and its magnitude. This book was written in the last three months of the year 1916. Of all the subjects of which a writer of tales is more or less conscious within himself this is the only one I found it possible to attempt at the time. The depth and the nature of the mood with which I approached it is best expressed perhaps in the dedication which strikes me now as a most disproportionate thing--as another instance of the overwhelming greatness of our own emotion to ourselves.