Patrick Butler for the Defence, first published in 1956, is a detective story by American writer John Dickson Carr, which features Carr's series detective Patrick Butler (who previously appeared in Below Suspicion).
Helen leaves, and Hugh must deliver a brief to famed defense lawyer Patrick Butler.
When they hear a scream, both rush back to Hugh's office to find Abu stabbed; he has just enough time and breath to gasp "Your gloves" in French before he expires.
Hugh immediately enlists the help of Patrick Butler, who is accompanied by the upper-crust Lady Pamela de Saxe.
The three, with occasional assistance from Helen, embark upon a series of breakneck escapes from the police and Hugh's strait-laced uncle while they gather evidence (including the beautiful stage magician Cécile Feyoum, Abu's widow).