When thus perplexed—and cogitating, among other hypotheses, whether the letter might not have been one of those decorations which the white men used to contrive in order to take the eyes of Indians—I happened to place it on my breast.
There are no more uses of "cogitate" in the book.
Show samples from other sources
But, exhausted by his cogitation, he’d have energy left for only one word, the name of the flower.
Gail Carson Levine -- Ella Enchanted
The average squirrel cogitation goes something like this: I wonder what there is to eat.