Samuel Taylor Coleridge wrote this for his son Derwent in 1807 — each line is written in the foot it describes:

Trōchĕe trīps frŏm lōng tŏ shōrt;
From long to long in solemn sort
Slōw Spōndēe stālks, strōng fōot!, yet ill able
Ēvĕr tŏ cōme ŭp wĭth Dācty̆l trĭsȳllăblĕ.
Ĭāmbĭcs mārch frŏm shōrt tŏ lōng.
Wĭth ă lēap ănd ă bōund thĕ swĭft Ānăpĕsts thrōng.
One syllable long, with one short at each side,
Ămphībrăchy̆s hāstes wĭth ă stātely̆ stride –
Fīrst ănd lāst bēĭng lōng, mīddlĕ shōrt, Amphĭmācer
Strīkes hĭs thūndērĭng hōofs līke ă prōud hīgh-brĕd Rācer.

If Derwent be innocent, steady, and wise,
And delight in the things of earth, water, and skies;
Tender warmth at his heart, with these meters to show it,
With sound sense in his brains, may make Derwent a poet –
May crown him with fame, and must win him the love
Of his father on earth and his father above.
My dear, dear child!
Could you stand upon Skiddaw, you would not from its whole ridge
See a man who so loves you as your fond S.T. Coleridge.

----please, draw me a sheep----