On the night express (Fred M. White)

Rupert Bascoe and Wakefield are the main characters of the story. They rode in the night express. They were familiar, even more, they had an affair. However, Miss Wakefield did not trust her partner. Let us dive into the past of our heroes and find out that Miss Wakefield had a tough action. Therefore, she constantly carries a weapon with her, like a wristwatch. But is it correct that she took it on a trip?