July 10, 1918. I have offered Francis Graeme his chance on the same terms. He has accepted, and John Thaneford is to be nominated the heir in his will of the residuary estate. But the Sigma ray stands on guard until I am convinced that he intends to keep his plighted word.
Chapter XXIII
The End of the Coil
Warriner laid the book on the table, and pulled out his pipe. I think it was a full five minutes before any of us said a word. But Betty kept her hand close-locked in mine.
"Any particular questions?" said Warriner at length.
"If I've got the hang of it," I began, "the Sigma ray was bound to get the man or woman who happened to be sitting in that big chair on the specified dates in June when the sun was in position to shine through the bullseye lens."
"Yes."
"Then I escaped through the accident that, when the window was repaired, the lens got mixed up with the ordinary glass bullseyes."