From the poem "An Evening Walk" by William Wordsworth (emphasis added):
FAR from my dearest Friend, 'tis mine to rove
Through bare grey dell, high wood, and pastoral cove;
Where Derwent rests, and listens to the roar
That stuns the tremulous cliffs of high Lodore;
Where peace to Grasmere's lonely island leads,
To willowy hedge-rows, and to emerald meads;
Leads to her bridge, rude church, and cottaged grounds,
Her rocky sheepwalks, and her woodland bounds;
Where, undisturbed by winds, Winander sleeps
'Mid clustering isles, and holly-sprinkled steeps;
Where twilight glens endear my Esthwaite's shore,
And memory of departed pleasures, more.
Fair scenes, erewhile, I taught, a happy child,
The echoes of your rocks my carols wild:
The spirit sought not then, in cherished sadness,
A cloudy substitute for failing gladness,
In youth's keen eye the livelong day was bright,
The sun at morning, and the stars at night,
Alike, when first the bittern's hollow bill
Was heard, or woodcocks roamed the moonlight hill.
What does the line "The echoes of your rocks my carols wild" mean?