Possible death information for Martha:
Social Security Death Index
Martha Rhoads
Last resided in Saint Petersburg, Pinellas Co., Florida
Born 10 Jul. 1900, died Dec. 1984
Soc. Sec. # issued in Pennsylvania between 1956-1958
Florida Death Index
Martha H. Rhoads
Born 10 Jul. 1900
Died 22 Dec. 1984 in Pinellas Co., Florida at age 84
Race - white
There's also a possible entry in the Social Security Death Index for Frances Hopwood born 6 Jun. 1902 and last residence of Shamokin. You can see it for free at rootsweb.com or familysearch.org. Herbert is listed there as well.
In the 1920 Census, Herbert G. Hopwood is at the Guantanamo Bay Naval Base in Cuba. He is listed as an ensign from Shamokin, Pennsylvania. His address in the US is 901 Shamokin Street. He was age 21 & single, born Pennsylvania, father born England, mother born Pennsylvania. I had never seen census records for military bases outside the US, so that was interesting for me.
