“He has heard something, or seen something,” thought the admiral, “and is gone to find out what it is.  I only wish I was with him; but up here I can do nothing at all, that’s quite clear.”

Charles, he saw, walked very rapidly, and like a man who has some fixed destination which he wishes to reach as quickly as possible.

When he dived among the trees which skirted one side of the flower gardens, the admiral was more puzzled than ever, and he said—­

“Now where on earth is he off to?  He is fully dressed, and has his cloak about him.”

After a few moments’ reflection he decided that, having seen something suspicious, Charles must have got up, and dressed himself, to fathom it.

The moment this idea became fairly impressed upon his mind, he left his bedroom, and descended to where one of the brothers he knew was sitting up, keeping watch during the night.  It was Henry who was so on guard; and when the admiral came into the room, he uttered an expression of surprise to find him up, for it was now some time past twelve o’clock.

“I have come to tell you that Charles has left the house,” said the admiral.

“Left the house?”

“Yes; I saw him just now go across the garden.”

“And you are sure it was he?”

“Quite sure.  I saw him by the moonlight cross the green plot.”

“Then you may depend he has seen or heard something, and gone alone to find out what it is rather than give any alarm.”

“That is just what I think.”

“It must be so.  I will follow him, if you can show me exactly which way he went.”

“That I can easily.  And in case I should have made any mistake, which it is not at all likely, we can go to his room first and see if it is empty.”

“A good thought, certainly; that will at once put an end to all doubt upon the question.”

They both immediately proceeded to Charles’s room, and then the admiral’s accuracy of identification of his nephew was immediately proved by finding that Charles was not there, and that the window was wide open.

“You see I am right,” said the admiral.

“You are,” cried Henry; “but what have we here?”

“Where?”

“Here on the dressing-table.  Here are no less than three letters, all laid as it on purpose to catch the eye of the first one who might enter the room.”

“Indeed!”

“You perceive them?”

Henry held them to the light, and after a moment’s inspection of them, he said, in a voice of much surprise,—­

“Good God! what is the meaning of this?”

“The meaning of what?”

“The letters are addressed to parties in the house here.  Do you not see?”

“To whom?”

“One to Admiral Bell—­”

“The deuce!”

“Another to me, and the third to my sister Flora.  There is some new mystery here.”

The admiral looked at the superscription of one of the letters which was handed to him in silent amazement.  Then he cried,—­