The Wave by Algernon Blackwood

Lettice Aylmer, daughter of the Irish Member of Parliament, did not provide the little talk that he anticipated, however, because she went back to her Finishing School abroad. Dr. Kelverdon was sorry when he heard it. So was Tommy. She was to be away a year at least. 'I must remember to have a word with her when she comes back,' thought the father, and made a note of it in his diary twelve months ahead. 'Three hundred and sixty-five days,' thought Tommy, and made a private calendar of his own.

It seemed an endless, zodiacal kind of period; he counted the days, a sheet of foolscap paper for each month, and at the bottom of each sheet two columns showing the balance of days gone and days to come. Tuesday, when he had first seen her, was underlined, and each Tuesday had a number attached to it, giving the total number of weeks since that wonderful occasion. But Saturdays were printed. On Saturday Lettice had spoken to him; she had smiled, and the words were, 'Don't forget me, Tommy!. And Tommy, looking straight into her great dark eyes, that seemed to him more tender even than his mother's, had stammered a reply that he meant with literal honesty: 'I won't -- never . . .'; and she was gone. to France. across the sea.