The brown waves of fog toss up to me
Twisted faces from the bottom of the street,
And tear from a passer-by with muddy skirts
An aimless smile that hovers in the air
And vanishes along the level of the roofs.

~ T.S. Eliot

It has been argued that Eliot is the most important English-language poet of the 20th century.  "Morning at the Window" was published in the book Prufrock and Other Observations in 1917.  It contains the poem that is regarded as a modern masterpiece and made Eliot famous, "The Love Song of J. Alfred Prufrock".