Sir Julian was busily engaged in drawing on his blotting-paper. He drew in rapid succession cats with arched backs and bottle-brush tails, always beginning with the tail and finishing with the whiskers, three on each side. Henry rightly interpreted this as a sign that he was to continue.
“The conversation which was overheard at Molloy’s flat referred to a Formula ‘A,’ which cannot possibly be the Formula ‘A’ which we know. There may be a Formula ‘A’ of which we know nothing, and it may constitute a grave danger. Ember”—Henry paused—“Ember is not only in a position of great responsibility with regard to our—the official Formula ‘A,’ but he also appears to be mixed up with this other unofficial and possibly dangerous Formula ‘A.’ The question, to my mind, is, ‘What about Ember?’”
Sir Julian continued to draw cats. Suddenly he looked up, and said:
“How long has Patterson been there?”
“A fortnight,” said Henry. “We recalled Jamieson, you remember, and sent him down.”
“Then, if there were unofficial experiments, they would be before his time?”
“Yes,” said Henry.
“Would it be possible—no, I’ll put it another way. Officially Luttrell Marches is impregnable, but unofficially—come March, the place practically belongs to you—is there any way in which there might be coming and going that would defy detection? You see, your hypothesis demands either wholesale corruption of Government workmen, or the introduction of other experiments.”
There was a pause. Then Henry said:
“In confidence, sir, there is a way, but, to the best of my knowledge, it is known only to myself and one other person.”