“Hell of a lot of privacy in this place!” he grinned. “Ladies who can walk through walls and others with regular invisible cloaks to let ’em flit wherever they please. Oh, well, don’t let it get on your nerves, Doc. Remember⁠—everything’s natural! That robe stuff is just camouflage of course. But Lord, if we could only get a piece of it!”

“The material simply admits all light-vibrations, or perhaps curves them, just as the opacities cut them off,” I answered. “A man under the X-ray is partly invisible; this makes him wholly so. He doesn’t register, as the people of the motion-picture profession say.”

“Camouflage,” repeated Larry. “And as for the Shining One⁠—Say!” he snorted. “I’d like to set the O’Keefe banshee up against it. I’ll bet that old resourceful Irish body would give it the first three bites and a strangle hold and wallop it before it knew it had ’em. Oh! Wow! Boy Howdy!”

I heard him still chuckling gleefully over this vision as I passed along the opal wall with the green dwarf.