My mind lets go a thousand things

My mind lets go a thousand things
Like dates of wars and deaths of kings,
And yet recalls the very hour--
'T was noon by yonder village tower,
And on the last blue noon in May--
The wind came briskly up this way,
Crisping the brook beside the road;
Then, pausing here, set down its load
Of pine-scents, and shook listlessly
Two petals from that wild-rose tree