All 3 Uses

compose
in
A Separate Peace
(Edited)

But his expression was composed, and he said in his resonant voice, "I wore this, you see, because it goes with the shirt and it all ties in together—I didn't mean that to be a pun, I don't think they're very funny, especially in polite company, do you?"
p. 27.7 *

composed = calm
Another turn and up the pool again—I noticed no particular slackening of his pace—another turn, down the pool again, his hand touched the end, and he looked up at me with a composed, interested expression.
p. 43.7
Brinker Hadley could compose his Shortest War Poem Ever Written
p. 92.1 *

compose = write

Definitions:

(1) (compose as in: compose a poem)
to write or create something with care
(2) (compose as in: composed of many parts)
to create something by arranging parts
(3) (compose as in: compose myself)
to calm someone or settle something
(4) (meaning too rare to warrant focus)
Specialized senses of compose include typesetting (preparing text for printing). There are many specialized senses of composition where context tells what something is made up from. Finally, in classic literature, compose may have been used to indicate settling a dispute.