"I was startled at this Holmes-like deduction"

 This is one of many references to classic crime literature. The famous detective Sherlock Holmes was created by Sir Arthur Conan Doyle, a Scottish writer who wrote four novel and 56 short stories featuring Holmes. His stories have been adapted into numerous television series and films, and are popular throughout the world. Interestingly, the phrase 'elementary, my dear Watson,' which is considered to be something of a Holmes catchphrase, never actually appears in any of the stories written by Arthur Conan Doyle.