Then Toohey’s face seemed to harden, drawing together again in composure, and Keating knew that Toohey had found relief somewhere, in his bones or in his gaping, bewildered face, that some hidden immensity of ignorance within him had given Toohey reassurance.
There are no more uses of "composure" in the book.
Show samples from other sources
After I regained my composure, I thanked her for telling me about the problem.
During all this time he was evidently struggling for composure.