I will arise and go now, for always night and day 
I hear lake water lapping with low sounds by the shore: 
While I stand on the roadway, or on the pavements gray, 
I hear it in the deep heart’s core.

Where does the speaker in “The Lake Isle of Innisfree” by William Butler Yeats say he hears the lake water lapping?

on the pavement

outside his window

in the glade

in his heart