One of the things that struck me as I read the information that you posted is that Adele Mara was married once, to the same man for fifty years! Very unusual for those in the acting profession.
There was some mention of Ms. Mara on the 'net -
http://www.nndb.com/people/302/000066104/
http://www.hollywoodpinup.com/pin-ups/_04adele-pinup.html
http://www.wantedcowgirls.com/images/LaffAdeleMara-wc.jpg
http://www.streetswing.com/films/video/f2_...ing_seabees.htm
(mention of JW dancing the jitterbug w/ Adele Mara)
Mrs. C