Complex sentence: The same day Conan Doyle wrote his letter of intent to Captain Anson, a long pseudonymous letter with apparent inside knowledge of what arguments Conan Doyle intended to publish began another round of letters, sent to Conan Doyle, Edalji, and Anson.
Split into simpler sentences: The same day Conan Doyle wrote his letter of intent to Captain Anson, a long pseudonymous letter with apparent inside knowledge of what arguments Conan Doyle intended to publish. Julian Barnes, Conan Doyle, Sherlock Holmes and the Edalji Case, D. Michael Risinger The'private detective' letter was the first of a series sent to Conan Doyle, Edalji, and Anson.