Smithsonian Institution Archives (2026-10-07; recheck of README's blocked page)

URL: https://siarchives.si.edu/collections/siris_arc_394182 (README says it refused scripted download; Chrome opened it).

Found [web]: photograph "Herbert Eugene Ives (1882-1953)", Fremont Davis, April 1938, at a National Academy of Sciences meeting; Science Service Records, Acc. 90-105, image SIA2008-4306; no access restrictions. Summary describes him as Director of Electro-Optical Research, Bell Laboratories.

Also seen in Google results: SIA RU007091 Science Service Records c.1910-1963 finding aid (https://siarchives.si.edu/collections/siris_arc_217249), which may hold Science Service news copy on the April 1938 announcement; not opened.

Bearing: dates Ives at the NAS meeting where the atomic-clock paper was read (25 April 1938). Note the LoC says the Ives papers were transferred from the Smithsonian in 1964-65.