If this is the same person she was born 15/3/1919 according to the army records for her father Peter Salmon of 15, Firhill Street Glasgow .....Peter married Henrietta McDonald 1913 Glasgow sister Mary born 30/5/1913 ,brother William 1916 ...father's occupation was guilder
Working with the birth date Rosie kindly gave above, couldn't see a death for a Henrietta Riddell on the SSDI. (Social Security Death Index)
That particular birth date gave these 2 names -
Henrietta Burriss 15 Mar 1919 who died 21 Aug 2011 Baltimore, Baltimore, Maryland
Henrietta Pechtold 15 Mar 1919 who died 3 Dec 2009 Lombard, Du Page, Illinois
Sandra