Time for a Bath

This serie is a bit of a mystery. The watermark shows Yva Richard, the decor however I did seen before in a shoot I had dedicated to Biederer Studio (see it here). Biederer often used more models in their shoots, while I never did see a shoot with more then one model from Yva Richard. So what does this tell us?
Perhaps I got it wrong and this shoot was originally taken by Yva Richard, or Yva Richard bought the shoot from the Biederer Brothers and sold it with his own watermark on the photos. I have to do a deep search to see if the model here turns up in other photos from Biederer Studio. That might give some more clue but then again it will perhaps always remain a mystery.