The cartridges contain several chemicals that combine when they are exploded and form a vapor which blinds a man and puts him out.

No one wants to kill such a person as this." She reached over and switched on the lights.
The man on the floor was Drummond himself.
"You will tell your real employer, Mr.Preston," she added contemptuously, "that unless he agrees to our story of his elopement with Florence, marries her, and allows her to start an undefended action for divorce, we intend to make use of the new federal Mann Act--with a jail sentence--for both of you." Drummond looked up sullenly, still blinking and choking.
"And not a word of this until the suit is filed.

Then WE will see the reporters--not he.

Understand ?" "Yes," he muttered, still clutching his throat.
An hour later Constance was at the telephone in her own apartment.
"Mr.Gibbons?
I must apologize for troubling you at this late, or rather early, hour.

But I promised you something which I could not fulfill until now.