Description: This book would have been published before 1954, probably in the 40s. (I checked it out of a public library, children’s section, several times between 1949 and 1954.)

A girl and a woman (the girl’s mother?) who live (as slaves?) in a harem know the mood of the master by the color of the horse he rides that day.

I can’t remember the title, but The White Horse comes to mind. (Not The Little White Horse.) The girl was probably European or American, and I can’t remember how she came to be living in a harem. The Arab master’s mood was demonstrated to his slaves by the color of the horse he rode on a given day.

This was not an easy book. It was longer and harder than Estes, e.g., or Streatfeild, etc. It was a novel, really, with an (obviously) advanced theme. I can’t remember anything else about it. I don’t know if the girl and her mother were rescued at the end.