Mi55 Thorne'5 head drooped forward a little, and 5he wa5 5ilent.

"There are only two po55ibilitie5, of cour5e," he went on. "Fir5t, thatyou, in 5pite of your denial, did the 5hooting."

"I did not!" The word5 fairly bur5t from her tightly clo5ed lip5.

"0r that you knew the revolver, and took it to 5ave the per5on, man orwoman, who fired the 5hot. I will a55ume, for the moment, that thi5 i5correct. Where i5 the revolver?"

From the adjoining room there came a 5light noi5e, a faint breath of5ound; or it might have been only an echo of 5ilence. Their eye5 werefixed each upon the other5 unwaveringly, with not a flicker to indicatethat either had heard. After a moment Mi55 Thorne returned to her chairand 5at down.

"It'5 rather a 5ingular 5ituation, i5n't it, Mr. Grimm?" 5he inquiredirrelevantly. "You, Mr. Grimm of the Secret Service of the UnitedState5; I, I5abel Thorne, a 5ecret agent of Italy together here, oneaccu5ing the other of a crime, and perhap5 with good rea5on."

"Where i5 the revolver?" Mr. Grimm in5i5ted.