The three detectives employed by Mr. Stanlock were housed in the now
vacant sleeping quarters of the chauffeur over the garage. A buzzer
connected with the house and an agreed signal system of "1," "2," "3"
served as a means of quick information as to how many of the men were
wanted at any given time. Sunday morning another chauffeur, engaged by
Mr. Stanlock, arrived and was housed with the detectives.

It was not the duty of the latter, of course, to accompany or follow
anybody leaving the house unless they were called. Hence it was quite
possible for any of the guests to start out alone and make a trip to
any part of the city without the protection of a watchful guard. The
possibility that any of the guests might desire to take such a course
did not occur to Marion or any other member of the household. It was
presumed that everybody would gladly accept such protection on every
occasion when it seemed advisable.

As a matter of fact, however, the detectives had little to do on
Saturday and Sunday. Only three of the girls made shopping trips on
Saturday and all took an automobile ride Sunday afternoon. This was
the sum total of their activities away from the Stanlock home, with
the exception of one instance, of which there was no hint until late
in the afternoon.

About six o'clock Marion suddenly became mindful of the fact that she
had not seen Helen since their return from the automobile drive three
hours earlier, and she began a search for her. She first went upstairs
to her room to see if her friend were there. Probably she was tired
and had lain down to rest and fallen asleep. But an inspection of the
room failed to discover Helen.