This text comes from The Complete Poetical Works of John Greenleaf Whittier, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
The subtle power in perfume found
Nor priest nor sibyl vainly learned;
On Grecian shrine or Aztec mound
No censer idly burned.
That power the old-time worships knew,
The Corybantes’ frenzied dance,
The Pythian priestess swooning through
The wonderland of trance.
And Nature holds, in wood and field,
Her thousand sunlit censers still;
To spells of flower and shrub we yield
Against or with our will.
I climbed a hill path strange and new
With slow feet, pausing at each turn;
A sudden waft of west wind blew
The breath of the sweet fern.
That fragrance from my vision swept
The alien landscape; in its stead,
Up fairer hills of youth I stepped,
As light of heart as tread.
I saw my boyhood’s lakelet shine
Once more through rifts of woodland shade;
I knew my river’s winding line
By morning mist betrayed.
With me June’s freshness, lapsing brook,
Murmurs of leaf and bee, the call
Of birds, and one in voice and look
In keeping with them all.
A fern beside the way we went
She plucked, and, smiling, held it up,
While from her hand the wild, sweet scent
I drank as from a cup.
O potent witchery of smell!
The dust-dry leaves to life return,
And she who plucked them owns the spell
And lifts her ghostly fern.
Or sense or spirit? Who shall say
What touch the chord of memory thrills?
It passed, and left the August day
Ablaze on lonely hills.