"Our Hoste saw well that the brighte sun
Th' arc of his artificial day had run
The fourthe part, and half an houre more;
And, though he were not deep expert in lore,
He wist it was the eight-and-twenty day
Of April, that is messenger to May;
And saw well that the shadow of every tree
Was in its length of the same quantity
That was the body erect that caused it;
And therefore by the shadow he took his wit."

Geoffrey Chaucer (1343 – 1400) was an English poet and author. He is widely considered the greatest English poet of the Middle Ages.