Quotation from: The Adventures of Sherlock Holmes

Written by: Sir Arthur Conan Doyle

"Not invisible but unnoticed, Watson. You did not know where to
look, and so you missed all that was important. I can never bring
you to realise the importance of sleeves, the suggestiveness of
thumb-nails, or the great issues that may hang from a boot-lace.
Now, what did you gather from that woman's appearance? Describe
it."