Moncure D. Conway was among the first (after Howells and The Nation)
to come to Twain's defense when he was beginning to come under
editorial fire for his anti-imperialist statements in 1900-1901.  See
his letter, "Mark Twain, Literature and War," New York Times (Jan. 11,
1901), p. 8.  There he says in part that Twain's statement might
arouse the intellectuals in the U.S. as they had been in France during the
Dreyfus affair.  He mentions that he was living in France "during the last
two years of that struggle," but since it actually wasn't quite over
yet in early 1901, I'm not sure what years he means.

According to Who Was Who in America, Conway "lectured in England and
became, 1863-84, minister at South Pl. Chapel, London; on staff
London Daily News, and Pall Mall Gazette."

Jim Zwick
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http://web.syr.edu/~fjzwick/