I was continually meeting more of these men of the future, who would follow me a little distance, chatter and laugh about me, and, having smiled and gesticulated in a friendly way, leave me again to my own devices.
There are no more uses of "gesticulate" in the book.
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The moderator turned her microphone off, leaving us to see her gesticulations, but not hear her words.
I couldn’t hear what they were saying or see their faces, but by their gesticulations, I’m sure they were angry at each other.