“I was conscious of a faint smell of the scent known as white jessamine.
There are seventy-five perfumes, which it is very necessary that a criminal expert should be able to distinguish from each other, and cases have more than once within my own experience depended upon their prompt recognition.”
“Hound of the Baskervilles” October 1889 Sir Arthur Conan Doyle
Lucky Sherlock- only seventy five perfume brands to consider. Now there are over 6000 fine fragrances and numerous other knock offs/mass market brands to work on.