good girl—knowing what she knew, or doing what she 
was doing ! She would go to Europe after this, or any 
place he chose to send her. 
In working out this plan of action the detective in charge 
made plain his determination to safeguard Cowperwood's 
person. It was one of the rules of the agency that no 
violence must be permitted in any case of this kind with 
which they were connected. Evidence, yes; but no vio- 
"We couldn't allow you to strike any blows or do any 
violence," Alderson told Butler, when they first talked 
about it. " It's against the rules. You can go in there 
on a search-warrant, if we have to have one. I can get 
that for you without anybody's knowing anything about 
your connection with the case. We can say it's for a girl 
from New York. But you'll have to go in in the presence 
of my men. They won't permit any trouble. You can 
get your daughter all right—we'll bring her away, and 
him, too, if you say so; but you'll have to make some 
charge against him, if we do. Then there's the danger 
of the neighbors seeing. You can't always guarantee 
you won't collect a crowd that way." Butler had many 
misgivings about the matter. It was fraught with great 
danger of publicity. Still he wanted to know. He 
wanted to terrify Aileen if he could—to reform her 
Within a week Alderson learned that Aileen and Cow- 
perwood were visiting an apparently private residence, 
which was anything but that. The house in South Sixth 
Street was one of assignation purely; but in its way it 
was superior to the average institution of this kind. It 
was of a high order of refinement, if the latter word may 
be permitted in this connection—of red brick, white-stone 
trimmings, four stories high, and all the rooms, some 
eighteen in number, furnished in a showy but cleanly way. 
It was not an institution of general but rather of a highly 
exclusive patronage, only those being admitted who were