Mary was a blonde actress who appeared in just three films before her untimely demise. Her best known role was as Phyllis Dean in the Shirley Temple short 'Merrily Yours'. In 1934 she was paralyzed from the neck down in a traffic accident. A benefit dance was held for her and Will Rogers helped to pay her medical bills, but sadly she died from the after effects three years later.
'Merrily Yours' if you fancy watching it
I couldn't find anything on the 'traffic accident' but would like to know more if anybody can source any info