Jessie B. Rittenhouse, ed. (1869–1948). The Second Book of Modern Verse. 1922.

Overtones

I HEARD a bird at break of day

Sing from the autumn trees

A song so mystical and calm,

So full of certainties,

No man, I think, could listen long

Except upon his knees.

Yet this was but a simple bird,

Alone, among dead trees.