The Adventure of the Dark Angels
The Adventure of the Dark Angels is a Sherlock Holmes murder mystery by Adrian Conan Doyle , the youngest son of Sir Arthur Conan Doyle , the Sherlock Holmes creator . 
<triplet> Sherlock Holmes <subj> Sir Arthur Conan Doyle <obj> creator <triplet> Adrian Conan Doyle <subj> Sir Arthur Conan Doyle <obj> father <triplet> Sir Arthur Conan Doyle <subj> Adrian Conan Doyle <obj> child