She could scarcely credit what her own ears had heard or her eyes had seen.  Harold Scott Mainwaring!  What could it mean?  Could it be possible that the secretary, having familiarized himself with the family history of the Mainwarings, was now masquerading under an assumed name for some object of his own?  But she dismissed this idea at once.  She had assured him at Fair Oaks that she believed him incapable of anything false or dishonorable, and she would abide by that belief until convinced otherwise.  But if this were indeed his name, what had been his object in assuming the role of Scott, the secretary?  Which was genuine and which assumed?  Who could tell?  As if in answer to her thoughts, she saw the subject of them approaching.  He was alone and looking in her direction, and on reading the recognition in her glance, his own face lighted with a smile that banished the last shade of resentment and suspicion from her mind, albeit there was a question in her eyes which prepared him in a measure for her first words.  With a smile as bright as those with which she had been accustomed to greet him at Fair Oaks, she extended her band, saying, slowly,-

“Mr. Mainwaring, this is indeed a surprise!” She watched him closely, but there was not the quiver of an eyelash, only a slow, inscrutable smile, as he replied,-

“Miss Carleton, I will add to that, and say that this is the pleasantest surprise of my life.”

She blushed at the implied meaning of his words, and he added,-

“I have not seen you on deck until to-day.”

“Not last Friday evening?” she inquired, archly.  His smile deepened.  “I did not know that it was you at that time until after I had started below.  Did you recognize me?”

“I thought I recognized your voice; and I have often wished to thank you for your kindness, but this is my first opportunity, as I have not been out since until to-day.”

“Please do not mention it.  Had I dreamed who it was thus braving the storm, I would have offered my assistance earlier.  I have not yet recovered from my surprise on discovering the identity of my fellow-passenger that evening.”

“Indeed!” laughed Miss Carleton; “my presence here is very easily explained.  It is simply the result of one of Mrs. Mainwaring’s numerous whims, as she suddenly decided upon an immediate return to England.  I think, however, that the surprise was mutual.”

“Accordingly, I suppose that mutual explanations should follow,” he answered, lightly.  Then added, more seriously, “Miss Carleton, I am aware that there is much in my conduct that must seem inexplicable to you.  In a few weeks everything will have been made clear, in the natural course of events; but, if you would be at all interested to hear, I would greatly prefer that you should have a perfect understanding of the situation before the facts become generally known.”

“I should greatly appreciate such a mark of confidence,” she replied.