She had wandered, without rule or guidance, in a moral wilderness, as vast, as intricate, and shadowy as the untamed forest, amid the gloom of which they were now holding a colloquy that was to decide their fate.
There are no more uses of "colloquy" in the book.
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She thanked everyone who participated in the colloquy.
I hadn’t completely realized it at the time, but that same Freudian colloquy which had fascinated and, at the most, amused me had been downright odious to Sophie and had caused her to flee with Nathan from the beach.