at I am not trying to trick you
into the confession which I am sure you will make--" He crossed the room
and flung open the door. "Come in, please, Miss Gresham."

The girl entered quietly--then saw her brother. Instantly her manner
softened. She stepped swiftly to his side and took his hand in hers.
"Please, Garry--"

Gresham smiled; a tender, affectionate smile.

"Good scout, aren't you, Sis? But tell me," his tone was conversational,
"how did you know that I shot Roland Warren?"

"You didn't!" She flung around on Carroll--"Don't believe him. I shot
Mr. Warren--"

"I knew from the first that you didn't do it, Miss Gresham. I know that
Miss Rogers spent the night with you. More than that, I know the identity
of the woman in the taxicab."

"Who was she?" It was Gresham who questioned.

Carroll shook his head. "It doesn't matter who she was, Gresham. We're
going to keep her name out of this case. She was a woman who loved Roland
Warren--and his death saved her from a great mistake. There's no
necessity to ruin her life, is there?"

"How did you know--it was Garry--who did the shooting?" asked the girl.

"The minute you confessed," answered the detective quietly, "I knew that
you were doing it to shield someone. You could have had no possible
motive for shielding either of the other two men under suspicion. I knew
that it must be your brother. He had motive enough--he knew that you
were in love with Mr. Warren--engaged to him. He knew that Warren was
about to elope with another woman, that it would cause you intense
misery. So he went to the station that night to prevent the elopement.
Isn't that so, Gresham?"

The young man nodded. "Yes. When I went to your apartment the morning
after the killing, it was for the purpose of confessing. But then when
you assured me that my sister was not under suspicion--I decided to wait
awhile before saying anything." He paused--"And as to that night--I
parked my car a couple of blocks away and walked to the station through
Jackson Street, intending to cut through the yards and approach the
waiting room from the passenger platform. I had no idea that--that there
would be--a tragedy. I wanted to reason with Warren; to beg him to save
my sister from suffering which I knew would be attendant on--his
elopement.

"He was walking in the yards as I entered from between the Pullman
building and the baggage room. I don't know what he was doing there--but
I spoke to him. He seemed st