I'm sure more are out there. I've listened to tons of old blues over the years, but this one was a revelation to me.
Speaking of old songs, a local friend posted this in his FB feed, Mona and Lisa Wagner are Austrian-born twins now living in Liverpool.
My father was a fan of Gene Austin, he had Gene's original hit from the late 1920s. But it's funny that every single cover I've heard since Patience & Prudence's 1956 version is based on their duet, not on the 1920s hit.