But, THIRD--and this only on Saskia's evidences--the worst danger to her began with the arrival of the Unknown.

What could that be?
Probably, kidnapping.

He was prepared to believe anything of people like Bolsheviks.

And, FOURTH, this danger was due within the next day or two.

Loudon had been quite willing to let him into the house and to sack all the watchers within a week from that date.