Here’s a publicity photograph from the photo page of the January 7 1932 edition of the Toronto Daily Star:
At the time of this photograph, Shirley Parshall was a performer in the 1931 edition of the Earl Carroll Vanities, which had been produced annually since 1923. She was part of a cast of 300. The show closed on April 9 1932 after a run of 300 performances (or an average of one performance per cast member).
Ms. Parshall had previously appeared as a cast member of The Street Singer, which ran from the fall of 1929 to the spring of 1930. I could find no other record of her anywhere.