1 page, 4to. Calder writes regarding a unique mobile acoustical reflector ceiling in the Aula Magna at the University of Caracas. In full: "The 'platillos voladores' in the Aula Magna are acoustic reflectors. The lights were put above them to make them stand out. But thanks for the plug."

[With:] VLAMINCK, Maurice de. Autograph letter signed ("Vlaminck"), to an unnamed recipient. Paris, n.d. 1 page, 8vo, on on La Tourilliere letterhead Rueil-la-Gadeliere stationery. Regarding a pending payment. -- CHAGALL, Marc. Signature on photocopied program for the "Unveiling of the Stained Glass Memorial by Marc Chagall," Lobby of the Secretariat Building, UN Headquarters, New York, 17 September 1968.