Then very rapidly Oliver Tropenell made an "O" and a "T," putting the T across the O so that any one not familiar with his signature would be hard put to it to know what the two initials were. He read over the words he had just written. They seemed poor, inadequate, and he felt strongly tempted to write the letter again, and word it differently. Then he shook his head--no, let it stand! Slowly he put the second sheet of the letter aside, and placed the first one, on which the ink was dry, before him. Then he looked round, with a queer, furtive look, and, getting up, made sure the door was locked. Coming back to the writing-table, he took out of the despatch-box lying there a small, square, crystal-topped flagon of the kind that fits into an old-fashioned dressing-case. The liquid in it was slightly, very slightly coloured, and looked like some delicate scent. From the despatch-box also he now brought out a crystal penholder with a gold nib. He dipped it in the flagon, and began to write in between the lines of the letter he had just written. As the liquid dried, the slight marks made by the pen on the paper vanished, for Oliver Tropenell was writing in invisible ink. "The decks are cleared between us, Laura, for you know now that I love you. You said, 'Oh, but this is terrible!' Yes, Laura, love is terrible. It is not only cleansing, inspiring, and noble, it is terrible also. Why is it that you so misunderstand, misjudge, the one priceless gift, the only bit of Heaven which God or Nature--I care not which--has given to man and woman? What you, judging by your words to-day, take to be love is as little like that passion as a deep draught of pure cold water to a man dying of thirst, is like the last glass of drugged beer imbibed by some poor sot already drunk." Oliver Tropenell waited awhile. There were still two spaces, before the bottom of the page of notepaper was reached, and again he dipped the pen into the strange volatile liquid. "God bless you, my dear love," he wrote, "and grant you the