Meanwhile, as fast as her light runabout would carry her, Elaine whizzed over to Fort Dale.

As she entered the grounds, the sentry saluted her, though that part of the formalities of admission was purely perfunctory, for every one at the Fort knew her now.

"Is Lieutenant Woodward in?" she inquired.

"Yes ma'am," returned the sentry. "I will send for him."

A corporal appeared and took a message for her to Woodward. It was only a few minutes before Lieutenant Woodward himself appeared.

"What is the trouble, Miss Dodge?" he asked solicitously, noting the look on her face.

"I don't know what it is," she replied dubiously. "I've found something among the rocks. Perhaps it is a bomb."

Woodward looked at the package, studying it. "Professor Arnold is investigating this affair for us," he remarked. "Perhaps you'd better take the package to him on his yacht. I'm sorry I can't go with you, but just now I'm on duty."

"That's a good idea," she agreed. "Only I'm sorry you can't go along with me."

She started up the car and drove off as Woodward turned back to the
Fort with a lingering look.