He was about to attack the lock when the "old man" interposed.

"Avast there, Saunders!" he ejaculated. "We'll have the job tackled a little more quietly. Go and ask the doctor for a small bottle of the strongest acid he has."

"That's good, Saunders," he remarked when the man returned. "Now lay on the acid all round the lock. Mind your eyes: it will splash a bit. We'll ruin the carpet, I fancy; but there'll be more serious damage done to the Company's property before long, unless I'm much mistaken."

Rapidly the powerful acid ate its way into the metal. The cabin reeked with the pungent fumes.

Captain Ramshaw waited until he considered that the corrosive fluid had sufficiently weakened the metal, then he soused the side of the trunk with water.

A gentle pressure of his boot brought the lock clean away. He raised the lid. The portmanteau was apparently full of clothes. Von Eckenhardt evidently had an extensive wardrobe.

"There's a double bottom, sir," announced the steward.

"I thought so," replied the captain quietly. "Be careful, Saunders. You will find a secret spring. Don't use unnecessary force."

Wondering why the skipper harped upon the necessity for caution the steward continued his investigations. At length he discovered an invisible push, close to the bottom of the trunk. As he pressed it, the false bottom opened upon a pair of hinges. The space contained several sealed envelopes and a tin case measuring about ten inches by six, and two inches in depth.

"You might hand over those papers," said the captain. "Now, open that tin."