“And Burt Ottman?” Mr. Parker inquired.

“They’re taking him to the ambulance now.”

Four men came out of the shack bearing the injured young man on a stretcher. Pale but conscious, he grinned as Sara tearfully bent over him.

“I’m okay, Sis,” he mumbled. “Feelin’ swell.”

Sara was allowed to ride with her brother to the hospital. Remaining behind, Mr. Parker, Jerry and the girls, tried to learn from police officers if Burt had made any statement.

“Sure, he was able to spill the whole story,” one of the men told them. “Seems he set out to prove that he was innocent of any association with the saboteurs. Instead of cooperating with police, he went to work on his own. He investigated an organization known as the American Protective Society. That put him on the trail of a head waiter at The Green Parrot, a foreigner by the name of Jard Wessler.”

“I understand now why Burt acted so queer about that billfold he lost along the river,” Penny commented. “He didn’t want me to know that he was meeting one of the saboteurs at the Parrot.”

“How many were involved in the dynamiting plot?” Mr. Parker asked.

“Twelve or thirteen. According to Ottman, Jard Wessler is the brains of the group. By pretending to go along with them, the kid gathered a lot of evidence.”

“But at first the saboteurs tried to throw the guilt on Burt,” Penny protested.