Ralph,
"His Captive Women" (1920) isn't one of the known Chan books by Earl Derr Biggers (http://tommenterprises.tripod.com/id90.html) nor is it one of the known "Lost Chans."

Keeper of the Keys was made into a Brroadway play . . . clip onto my website icon for more information about it.

Rush Glick (this site's proprietor) or another Chanite may post here if they know more.

And welcome to our world!

Virginia