“Of course you must have that,” said Mr. Cutler; “the only difficulty will be in getting it away without exciting suspicion.  We must have this door between these rooms opened by some means.  I wonder if the key to ours would fit the lock.”

He arose immediately and went to try it, but it would not work.

“No.  I did not expect our first effort would succeed,” he smilingly remarked, as he saw Mona’s face fall.  “There is one way that we can do if all other plans fail,” he added, after thinking a moment; “you can go back to the other room and unpack your trunk, when I could easily remove it through the window, and it could be repacked in here; but that plan would require considerable time and labor, and shall be adopted only as a last resort.  But wait a minute.”

He sprang to his feet, and disappeared through the window, and the next moment they heard him moving softly about in the other room.

Presently he returned, but looking grave and thoughtful.

“I hoped I might find a key somewhere in there,” he explained, “but the door bolts on that side.  There should, then, be a key to depend upon for this side.  I wonder—­”

He suddenly seized a chair, placed it before the door, stepped upon it, and reached up over the fanciful molding above it, slipping his hand along behind it.

“Aha!” he triumphantly exclaimed all at once, “I have it!” and he held up before their eager gaze a rusty and dusty iron key.

A moment later the door was unlocked, and swung open between the two rooms.

Five minutes after, all Mona’s baggage was transferred to Miss Cutler’s apartment, the door was relocked and bolted as before, and the fair girl felt as if her troubles were over.

Overcome by the sense of relief which this assurance afforded her, she impulsively threw her arms about Miss Cutler, laid her head on her shoulder, and burst into grateful tears.

“Oh, I am so glad—­so thankful!” she sobbed.

“Hush, dear child,” said the gentle lady, kindly, “you must not allow yourself to become unnerved, for you will not sleep, and I am sure you need rest.  I am going to send Justin away at once, then we will both retire.”

“Yes, I will go directly,” Mr. Cutler remarked, “but I shall call you early.  I will have your breakfast sent up here, when your trunks can be removed.  Then, Miss Montague, you are to put on a wrap belonging to my sister, and tie a thick veil over your face.  I will come to take you to the carriage, and no one will suspect but that you are Marie.  Meantime she will slip down another stairway, and out of the private entrance; then away we will speed to the steamer, and all will be well.  Now, good-night, ladies, and a good sleep to you,” he concluded, cheerfully, as he quietly left the room.

Miss Cutler and Mona proceeded to retire at once, but while disrobing the elder lady told her companion how it happened that she and her brother were in Havana so opportunely.  She had been out of health, and had come to Cuba early in the fall to spend the winter.  Her brother had come a few weeks earlier to take her home, and they had been making excursions to different points of interest on the island.