to tell you 'later on.' I thought what you had against me might be the name and the plot of my book, dramatised by Carr Price."
"What the devil is the name or plot of your play to me?"
"Ah, that was what I wanted to know. It occurred to me as possible that you resented the incident of a key being found in a dead man's pocket, and the title of the book and play which might recall a certain double tragedy to the public mind."
The blood rushed to the man's face. He understood instantly, and did not choose to pretend ignorance. "How dare you presume that I have a right to resent any such reference?" he challenged me.
"I dare, because of the second of the two things I reserved to tell you later: the wish I have to prove my detective powers for your benefit. I couldn't help seeing to-day your meeting on deck with Miss Callender. I couldn't help hearing a few words. Because I play at being a detective I keep my wits about me. Also I have a good memory for names and stories connected with them. Mr. Odell, will you separate me in your mind from my brother and give Carr Price's play a chance for its life if I tell you who killed Perry and Ned Callender-Graham, and prove to Miss Callender that there's no reason why she need be afraid to give her love to any man?"
Odell stared as if he thought I had gone mad or he was dreaming.
"Who killed Perry and Ned Graham?" he repeated. "No one killed them."
"You are wrong," I said quietly.
"That's your opinion!" he blurted out.
"That's my opinion. And if I'm right, if those two were murdered, and if the murderer or murderers can be found, won't Miss Callender feel she may safely marry a man she loves without delivering him up to danger?"
"Yes," Odell admitted. "Great Heaven, if you were right!"
"Supposing I am, and can prove it?"
"There's nothing on God's earth I wouldn't do for you."
"Well," I said, "I believe there's something in that opinion of mine. Don't dream that now I am getting at this truth I would bury it even if you did worse than crush my play. I'll go on, anyhow, but – "
"You say you are getting at the truth," he broke in. "What do you think – what do you know? But how can you, a stranger, know anything?"
"A stranger to you and those connected with the case, but not to the case itself. You may thank that despised detective instinct of mine for my keen interest in its details."
"If you thought you'd unearthed the clue to a mystery, why didn't you advertise yourself by pointing it out to the police a year and a half ago?"
"I certainly should if I'd got hold of it then, though not for the motive you suggest, Mr. Odell. My publishers were giving me all the publicity I wanted. As it happens, I picked up the clue in question only – a short time ago."
"Only a few hours ago" were the words which all but slipped out. I bit them back, however. My line with a keen business man like Roger Odell was not to give away something for nothing. It was to sell – for a price.
He tried to keep his countenance, but his eyes lit. I saw that my hint, like a spark to gun-cotton, had set him aflame with curiosity. Already, in spite of himself, he began to look on me less as an enemy than an agent; perhaps (a wonderful "perhaps" he could not help envisaging) a deliverer.
"For God's sake, speak out and say what you mean!" The appeal was forced from him. He looked half ashamed of it.
"I can't do that – yet," I returned. "I might tell you my suspicions; but that wouldn't be fair to myself, or you, or – anyone concerned. I must land first. Once off the ship, twenty-four hours are all I shall need to find – I won't say the 'missing link,' because I have reason to think it will not be missing, but the link I can't touch this side of New York. I will make a rendezvous with you at the end of that time, either to tell you I've put two and two together with the link, or else to confess that the ends of the chain can't be made to fit."
Odell stared at me hungrily.
"You want only twenty-four hours to do what the best police in the world haven't done in a year and a half," he growled at me. "You think something of yourself, don't you?"
"You see, I've known myself for a long time," I said modestly. "You've only just been introduced to me, and were prejudiced to begin with. About that rendezvous – do you consent to my appointing the place?"
"Yes," he agreed. "Your hotel?"
"No. In the manager's private office at the Felborn Theatre; the time, twenty-four hours after we get away from the dock. That will be the most convenient place for both of us in case of my success, for Julius Felborn and Carr Price can be called in to fix a date for the first rehearsal of The Key."
The man could not keep back a laugh. It was harsh and short; but it was a score for me and he knew it. "The Felborn Theatre let it be," he said grimly.
The weather was fine and we made almost a record trip in point of time. There was nothing for Odell to regret in the briefness of the voyage, for Grace Callender remained in her cabin till he sent a message by her aunt, promising not to try for a word or a look if she came on deck. After that she appeared again, as if to show appreciation, and Odell didn't abuse her confidence. He kept himself to the other side of the deck; but there was no reason why I should give up my place near the two ladies. After the first night's dinner en tête-à-tête, Odell and I had no more meals together; consequently, the Misses Callender, aunt and niece, were unaware of our acquaintanceship. They had no reason to shun their lame neighbour, and my crutches gave me their sympathy, as they have given me various other blessings. Instead of my picking up a dropped book, as a man usually contrives to do if he yearns to know a girl on shipboard, Grace Callender retrieved one for me. After that, I was permitted, even encouraged, to draw my deck-chair closer to theirs and "tell them things about the war." I noticed that the girl caught eagerly, nervously, at any subject which could hold her attention for a moment, even that of my book and Carr Price's play. I, having the secret clue, guessed that she was for ever trying to escape from a thought too engrossing. Her aunt, Miss Marian Callender, had the clue also; and often I caught her long dark eyes – eyes like those of La Gioconda – fixed with almost painful intentness on Grace. "She knows that her niece is thinking about Odell," I told myself. Evidently she approved the girl's decision to put him out of her life. If she had been Odell's friend and sympathiser, a woman of her superior age and strong personal charm (for she had a sort of hypnotic charm, like a velvet-petalled flower with a penetrating perfume) could surely have influenced an impressionable girl, especially one so devoted to her as Grace Callender was.
It was nine o'clock on an April morning when we escaped from the custom-house men and spun away from the White Star docks in a glittering grey car. When I say "we," I refer to myself and the two Misses Callender. They had befriended me to the extent of recommending me to an hotel and offering to motor me to it; and I was malicious enough to hope that Odell might see me going off with them. There was little doubt in my mind that he did so, and none at all of what feelings must have been roused by the sight. These would have been still more poignant had he known that it was Grace who impulsively invited me, Marian who merely followed with a polite echo. They lived in a large old-fashioned house in Park Avenue, where the car dropped the ladies and by their order took me on to the Hotel Belmont. There Carr Price was waiting, for when – the day before our landing – the Callenders had mentioned the Belmont I marconied him to meet me at the hotel.
"Why did you wire 'Don't come to the dock?'" he asked almost resentfully.
"Because I thought
