Some idiot's inspiration &Co blog.

"Why, man, it is the most practical medico-legal discovery for years. Don’t you see that it gives us an infallible test for blood stains. Come over here now!" He seized me by the coat-sleeve in his eagerness, and drew me over to the table at which he had been working. "Let us have some fresh blood," he said, digging a long bodkin into his finger, and drawing off the resulting drop of blood in a chemical pipette." — A Study in Scarlet, by Sir Arthur Conan Doyle, illustrated by V. Setoft (1944)