Bach and the Sentry

Watching the dark my spirit rose in flood On that most dearest Prelude of my delight. The low-lying mist lifted its hood, The October stars showed nobly in clear night. When I return, and to real music-making, And play that Prelude, how will it happen then? Shall I feel as I felt, a sentry hardly waking, With a dull sense of No Man's Land again?