self-collected

[ self-kuh-lek-tid, self- ]

/ ˈsɛlf kəˈlɛk tɪd, ˌsɛlf- /

having or showing self-control; composed; self-possessed.

Origin of self-collected

First recorded in 1705–15

self-col·lect·ed·ness, noun

Accomplished and self-collected as he usually was, he could not wholly conceal the hell within.

Godolphin, Complete |Edward Bulwer-Lytton
And so she counsels him about his face—like a self-collected, trustworthy woman.

Blackwood's Edinburgh Magazine, Vol. 66, No 409, November 1849 |Various
She was still very pale, but now also very calm; the most self-collected one in that room of death.

Cruel As The Grave |Mrs. Emma D. E. N. Southworth
To be self-collected in danger is one of the signs of courage.

The Days of Chivalry |Ernest Louis Victor Jules L'Epine

Previously to it I was calm, considerate, and self-collected.

Edgar Huntley |Charles Brockden Brown