A collection of some of detective Sherlock Holmess best-known cases. Using his famous powers of deduction and observation he tracks down criminals through the gaslit streets of Victorian London, with the help of his friend Dr Watson. Conan Doyles famous detective is always at his best when faced with an unsolvable crime, following the smallest of clues to unravel the m A collection of some of detective Sherlock Holmess best-known cases. Using his famous powers of deduction and observation he tracks down criminals through the gaslit streets of Victorian London, with the help of his friend Dr Watson. Conan Doyles famous detective is always at his best when faced with an unsolvable crime, following the smallest of clues to unravel the mystery.