Old Tinker seemed unaffected by this outburst, but for that matter he seemed unaffected by anything. His dead gaze followed his employer's to-and-fro striding as a cat's follows a pendulum, but without the cat's curiosity about a pendulum. He never interrupted when Potter was speaking; and Canby noticed that whenever Potter talked at any length Tinker looked thoughtful and distant, like a mechanic so accustomed to the whirr and thunder of the machine-shop that he may indulge in reveries there. After a moment or two the old fellow ceased to follow the pendulum stride, and turned to the playwright. “I'll tell you the two surest ways to make what you call the public like a play, Mr. Canby,” he said. “Nothing is sure, but these are the nearest to it. Make 'em laugh. I mean, make 'em laugh after they get home, or the next day in the office, any time they get to thinking about it. The other way is to get two actors for your lovers that the audience, young and old, can't help falling in love with; a young actor that the females in the audience think they'd like to marry, and a young actress that the males all think they'd like to marry. It doesn't matter much about the writing; just have something interfere between them from eight-fifteen until along about twenty-five minutes after ten. The two lovers don't necessarily have to know much about acting, either, though of course it's better if they happen to. The best stage-lover I ever knew, and the one that played in the most successes, did happen to understand acting thor--” “Who was that?” Potter interrupted fiercely. “Mounet-Sully?” “No. I meant Dora Preston.” “Never heard of her!” “No,” said the old man. “You wouldn't. They don't put up monuments to pretty actresses, nor write about them in school histories. She dropped dead in her dressing-room one night forty-two years ago. I was thinking of her to-day; something reminded me of her.” “Was she a friend of yours, Mr. Tinker?” Canby asked.