Treasure on Spyglass Hill

Gary didn't move. He didn't even try. He was staring straight up at the great house.

For there on the second-floor balcony, near one of the big windows glowed a light that seemed to float on nothing as it passed pillar after pillar.

And that was not all he saw. Next to that bright circle of light, glowed something yellow, and it was moving too. As the boys continued to watch, a huge black shape flapped around the mysterious light, sometimes hiding it. It floated like a large sheet of cloth bl...