It was a landscape in water colours, of which I had made a present to the superintendent, in acknowledgment of her obliging mediation with the committee on my behalf, and which she had framed and glazed.
There are no more uses of "mediate" in the book.
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By this time the two former friends were hardly speaking to each other and had to call in local elders to mediate.
Malala Yousafzai -- I Am Malala
Im— mediately after we were finished eating, Mambu gave each boy his share of the money.