In the story 'The Hound Of The Baskervilles ' by Sir Arthur Conan Doyle, the detective Sherlock Holmes asks the client Sir Baskerville a young baronet, to tell him in great detail all about his circumastances and whether there is anything out of the ordinary in them , no matter how small. He knows that small seemingly trivial events can often prove very significant. The young baronet tells him that he is upset because he bought a lovely new pair of boots (two) in The Strand London and has had one of them stolen, or gone missing, before even getting the chance to wear them, They were tan-coloured and he had left them out to have a special protective coat brushed on to them. This would have protected the new leather from the rain, as up unti then they had only had a treatment of ordinary polish. By the time he gets back to the hotel, he has had the other one stolen as well and later in the story we hear how shoes and boots are very useful in tracking people down because of the (usual) human scent.