FYI, George Antheil's collection of books contains two Futurist
paperbacks (circa 1912) bound by the composer in cloth into a single
volume with a leather label + gold-embossed title, as well as a run
of La Révolution Surrealiste from the first issue (Dec 1924) thru
most of about 7 numbers, similarly preserved.   The former contains
"Vostro marito non va? . . . Cambiatelo!" by Mario Dessy (1919) and
Zang Tumb Tuuum (1912, pub 1914) by Marinetti.  Man Ray was a close
friend of Antheil's; Breton's 1928 book on surrealist painting is
among Antheil's books and the two were planning an opera together;
Max Ernst's collage novels were favorites of Antheil's and he wrote a
suite of 45 piano pieces based on La Femme 100 Têtes.  I can't
imagine that Pound was not well acquainted, even friendly, with most
of these figures whose literary work was no threat to Pound's status.

I would be interested to hear what others know.

Charles Amirkhanian
Antheil Estate