Opening Gambit:"Explain to me how that happens (happened) ... Make sure that you go step by step - you have to make clear how one thing logically leads (led) to another ..."Sherlock Holmes is the mythical master of explanation. Here he is, in the very first story "A Scandal in Bohemia" (1892), impressing Watson, as usual, with his powers of observation and deduction. No sooner has Watson entered 221B Baker Street than...