"Then I'd rather let it go back to its home in the river bed," Grizzel cried passionately. As she spoke she snatched the crystal from Hugh's hand; there was a flash of green light—a splash—and it was gone.

She turned and ran, sobbing and crying. Prudence followed, bent upon comforting her. Mollie looked scared, Jerry laughed, Hugh shrugged his shoulders:

"Just like a girl!" he said. "It doesn't matter; we'll find more. But that was a good diamond; I'd have liked to show it to Mr. Fraser. We'd better collect our things and go home."

Three of them turned away, but Dick lingered behind. His quick eyes, trained to watching the flight of balls of all sizes from footballs to golf-balls, had taken accurate note of the spot where that little splash had been. There were still circles widening round it. The creek looked shallow just there.

"If I scooped up the sand carefully now, as likely as not I'd retrieve that stone," he said to himself. "Grizzel is a decent little kid; she'll be sorry by and by, and, besides, the old chap ought to have his diamond if it really is a diamond. Diamonds aren't so jolly easy to come by as Hugh seems to think. That white stone is almost in the middle of the circle—I'll make for that."

"Don't wait for me," he shouted after the others, "I'm coming in a jiff." He waited till he saw them turn their somewhat dejected and preoccupied backs upon the scene of the late disaster, and then transferred his attention to the creek. At the point where he stood the water was comparatively deep; it had evidently formed a channel for itself, helped, probably, by a slender waterfall which dropped over a large boulder on the higher ground some distance beyond the fallen tree.

"I can crawl over that and drop off at the shallow part," he thought,
"I'll have to look sharp or the circles will be gone."

He rolled up his already short flannels and started. The tree was by no means steady—it rolled and shook under his weight; but, as the worst that could happen would be a good soaking, he did not worry overmuch, and soon slid off into the shallow stream. As he had predicted, the water there barely reached to his knees. He scrutinized the ever-widening circle, now faint and irregular, and, calculating the distance from its edge to its centre, he fixed his eyes intently upon the white stone and cautiously waded towards it, his movements in the water breaking up the last traces of the circle. When he reached the white stone he halted.

"It was here, almost to a T, or my name is not Richard Gordon," he muttered, and, stooping carefully, he scooped up a double handful of shingly sand from the river bottom. He stood up, letting the water run away through his tightly closed fingers. As he bent his head to examine the pebbles left in his hand, a sunbeam darted over his shoulder—there was a flash of pale green.

"Got it, by jinks!" he chuckled exultantly. "First go-off! Good for you, Richard, my boy—your eye is pretty well in and no mistake. Come out of that, my young diamond, and let's have a look at you—you'd do A1 for heliographing with."