Grace McDonald was an actress/singer/dancer. She appeared in a couple of dozen features in the early to mid-1940s, but I remember her as 'Kitty' in Abbott & Costello's 1943 feature "It Ain't Hay".
She retired rather abruptly when she got married, and moved to Minnesota, where she and her husband raised their family.
I was given an address for her, by another autograph collector, in the early 1980s, and sent her a photo to sign. She did, but she used a ballpoint pen, resulting in a barely legible signature. If you look very closely, you may see the very light image of a signature on the lower right of this photo.