The moment Ronald Mason and his companion hurled Old and Young King Brady in the bed of quick-sand, they ran away.
Dodging behind the rocks, they hid themselves.
By this time the sun was rising.
Finding it impossible to extricate themselves from the deadly grip of the treacherous sand, the detectives ceased their struggles.
"It's useless, Harry," said the old sleuth, despairingly.
"If we remain passive, we'll soon sink beyond our depth, and perish."
"Yell at the top of your voice. Some one may hear us."
"Help! Help! Help!" shouted Harry.
They were shouting this way when Mason came from behind the rocks, pulled off his mask, and grinned sardonically at them.
Finally he said in sarcastic tones: