If I can get the true story of Alixe Delavigne's life, then I have the key of the Johnstone mystery.

Ah! There is now a duty signal for me!" The Major smartly approached the main entrance of that cosiest of Swiss family hotels, the Faucon, as the anxious face of a woman nurse appeared.

"Madame veut bien voir Monsieur!" simply announced the servant.

Major Hawke brushed by her with a nod and quickly mounted the stair.

To his utter surprise, on entering Madame Berthe Louison's apartment, the signs of an approaching departure were but too evident.