I Wandered Lonely as a Cloud
(erroneously known as “The Daffodils”) is an 1804 poem by William Wordsworth. It was inspired by an April 15, 1802 event in which Wordsworth and his sister, Dorothy, came across a “long belt” of daffodils. It was first published in 1807, and a revised version was released in 1815. The poem is written in iambic tetrameter.
– Wikipedia

Napoleon ruled in France and
Thomas Jefferson had just completed the Louisiana Purchase
as Dorothy walked with her brother past some daffodils.
She never suspected her brother would write about them
or that his poem would become famous.

“I never saw daffodils so beautiful they grew among the mossy stones about and about them, some rested their heads upon these stones as on a pillow for weariness and the rest tossed and reeled and danced and seemed as if they verily laughed with the wind that blew upon them over the lake, they looked so gay ever dancing ever changing.” – Dorothy Wordsworth, The Grasmere Journal

I wandered lonely as a cloud
That floats on high o'er vales and hills,
When all at once I saw a crowd,
A host of golden daffodils;
Beside the lake, beneath the trees,
Fluttering and dancing in the breeze.

Continuous as the stars that shine
and twinkle on the Milky Way,
They stretched in never-ending line
along the margin of a bay:
Ten thousand saw I at a glance,
tossing their heads in sprightly dance.

The waves beside them danced; but they
Out-did the sparkling waves in glee:
A poet could not but be gay,
in such a jocund company:
I gazed – and gazed – but little thought
what wealth the show to me had brought:

For oft, when on my couch I lie
In vacant or in pensive mood,
They flash upon that inward eye
Which is the bliss of solitude;
And then my heart with pleasure fills,
And dances with the daffodils.

– William Wordsworth