In Saylee's "Jeeves and the Rescue" (http://archiveofourown.org/works/728173), Bertie said "because she (Angela) already knew I was safe in cabs"! (The line appears in the end of the story.)

Took almost one hour to find this fic.. (*sigh*) but it's OK, I wanted to know where did I read this phrase. Nice fic must be remembered ;)

I hope this is what you are looking for :D