had a try for something more precious still, but luckily they failed to open the big safe.”
“Madame, these are the facts of the case. Your late secretary, Madame Veroneau, was really the Countess Rossakoff, an expert thief, and it was she who was responsible for the disappearance of M. Halliday. How long had she been with you?”
“Five months, monsieur. What you say amazes me.”
“It is true, nevertheless. These papers, were they easy to find? Or do you think an inside knowledge was shown?”
“It is rather curious that the thieves knew exactly where to look. You think Inez———"
“Yes, I have no doubt that it was upon her information that they acted. But what is this precious thing that the thieves failed to find? Jewels?”
Madame Olivier shook her head with a faint smile.
"Something much more precious than that, monsieur.” She looked round her, then bent forward, lowering her voice. “Radium, monsieur.”
"Radium?”
“Yes, monsieur. I am now at the crux of my experiments. I possess a small portion of radium
