本章波西提到的诗是《公子罗兰来寻黑塔》( Childe Roland to the Dark Tower Came,Robert Browning)
唱歌段落的歌词出自《失落和弦》(The Lost Chord,Adelaide Anne Procter):
Seated one day at the organ,
I was weary and ill at ease,
And my fingers wandered idly
Over the noisy keys.
I know not what I was playing,
Or what I was dreaming then;
But I struck one chord of music,
Like the sound of a great Amen.
……
I have sought, but I seek it vainly,
That one lost chord divine,
Which came from the soul of the organ,
And entered into mine.