There is no doubt about it whatever.

She and the Baroness were schoolfellows in Brussels.

There is no mystery about their friendship at all." Heneage was thoughtful for several moments.
"This is interesting," he said at last, "but it does not, of course, affect the situation." "You mean that you will go on just the same ?" Wrayson demanded.
"Certainly! And it rests with you to say whether you will be on my side or theirs," Heneage declared.

"If you are on mine, you will tell me what Miss Deveney was doing in these flats on that night of all others.

If you are on theirs, you will go and warn them that I am determined to solve the mystery of Morris Barnes' death--at all costs." "I had no idea," Wrayson remarked quietly, "that you were ambitious to shine as an amateur policeman." "We all have our hobbies," Heneage answered.