This cover from Los Angeles, CA (Jan 28, 1947) to Bennington, VT (Jan 30/31, 1947) used nine copies of the 1946 U.S. commemorative issue for the 100th Anniversary of the Smithsonian Institution and a supplemental two cent stamp to pay the airmail postage (5¢), plus the registration (20¢) and return receipt (4¢) service fees. The cover was returned undelivered to the sender (Feb 4/8, 1947) as the recipient was deceased.
Returned to sender – recipient deceased
The Mesozoic Times 