16/21 "It is a puzzle to me how the men who found the ruby managed to get it out of the ruby rock and partially polish it. They had no tools or instruments of any kind--at least, we found none in the cave. Undoubtedly there are rubies in that part of the world. It was near the valley that Moynglass found his sample of corundum, with a ruby crystal in it. On our way back, at the head of the valley, I came across a belt of magnesian rocks charged with ores of copper and iron, and probably containing the matrix of ruby crystals." "I wonder you wear the thing," said the chubby-faced youth of the Flying Corps, handing the ring across the table to the explorer. |