This costume in this photograph has been identified using a photograph in the press cuttings for The Mastersingers (RefNo PAR/2/?). Parr is dressed as Magdelene or Magdelena.
Photographer unkown, is likely to be Capstack, as are the other studio photographs of Parr in this costume.
There are two copies of this photograph. The back of one of the photographs has been annotated 'Gladys parr as Mistress Quickly in The Merry Wives of Windsor'. However, this costume is the same as Parr in The Mastersingers.