In Chapter 1, 1 of Anne of Windy Poplars, Anne concludes a long letter to Gilbert introducing her new surroundings at Summerside

This is a merciless letter, Gilbert. I won’t inflict such a long one on you again. But I wanted to tell you everything, so that you could picture my new surroundings for yourself. It has come to an end now, for far up the harbor the moon is ’sinking into shadow-land.’

In Chapter 3, 10 of Anne of Windy Poplars, the dramatic young Hazel Marr berates Anne for meddling with her love affair.

“I shall never love anybody again,” said Hazel, stonily calm. “Love brings only sorrow. Young as I am I have learned that. This would make a wonderful plot for one of your stories, wouldn’t it, Miss Shirley? I must be going . . . I’d no idea it was so late. I feel so much better since I’ve confided in you . . . ‘touched your soul in shadowland,’ as Shakespeare says.”

“I think it was Pauline Johnson,” said Anne gently.

“Well, I knew it was somebody . . . somebody who had lived. I think I shall sleep tonight, Miss Shirley. I’ve hardly slept since I found myself engaged to Terry, without the least notion how it had all come about.”

Moonset
By Emily Pauline Johnson (Tekahionwake)

Idles the night wind through the dreaming firs,
That waking murmur low,
As some lost melody returning stirs
The love of long ago;
And through the far, cool distance, zephyr fanned.
The moon is sinking into shadow-land.

The troubled night-bird, calling plaintively,
Wanders on restless wing;
The cedars, chanting vespers to the sea,
Await its answering,
That comes in wash of waves along the strand,
The while the moon slips into shadow-land.

O! soft responsive voices of the night
I join your minstrelsy,
And call across the fading silver light
As something calls to me;
I may not all your meaning understand,
But I have touched your soul in shadow-land.