Library of Congress Manuscript Division: Ives papers (2026-10-07)

URL: https://findingaids.loc.gov/repositories/19/resources/4117 (handle https://hdl.loc.gov/loc.mss/eadmss.ms010111; catalog https://lccn.loc.gov/mm78027508). Reached in Chrome via loc.gov search "Ives family papers Herbert Ives" (Cloudflare check passed by waiting).

Found [web]: - "Frederic Eugene Ives and Herbert Eugene Ives Papers", MSS27508, 1869-1957, 5,000 items, 15 containers + 2 oversize, 6.9 linear feet. Series: General Correspondence 1893-1957; Printed Matter; Speech, Article, and Book File of Herbert Eugene Ives 1906-1952; Miscellany; Addition 1934-1953; Oversize. Open to research. - Scope note: Herbert's work "evolved from an interest in optics and photography to serious criticism of Albert Einstein's theory of relativity." Letters in the late 1940s and early 1950s from E. E. Butterfield "describe the dissatisfaction in certain scientific circles with Einstein's theories. Einstein and his followers are castigated as left-wing radicals". Correspondents include Albert Einstein, Harry S. Truman, George Eastman, King George V, Courtney H. Hodges. - Provenance: transferred from the Smithsonian Institution 1964-65, given by Mabel Ives (widow) 1966; additions by Vera Kimball Castles 1978. - Chronology: born 1882 July 31, Philadelphia; died 1953 Nov. 3, New York. (claims.md records 13 Nov per Wikipedia/NAS and 15 Nov per Optica: this is a third date. The Chappell wiki gives birth 21 July 1882; LoC 31 July.) - Container list exists (Boxes 1-15, OV1-2) but box-level folder titles were not opened (time). - Lalli (2014, ESHS proceedings, see 2026-10-07-pure-mpg.md) cites Ives to Elmore E. Butterfield, 5 Oct 1951, Box 13, correspondence.

Bearing: this is the primary archive for Ives's relativity correspondence (the "hidden network of allies" Lalli 2013 describes), any Einstein correspondence, and drafts. Absence-of-evidence analysis: the record does not go dark; it is held here. Lead: obtain the container list for Boxes 12-15 and the Einstein letter(s).