My grandfather, who would be 116 if still alive, used to carry his own little first aid kit around in the form of - "black drawing salve". I cannot imagine what was in that stuff, the smell was awful, but you can take my word for it - he used it on infected teeth, cuts, bruises , eye styes etc. He would even put small amounts around the inside of his nose when he had a head cold - to "clear his head up". You name the problem, he had the cure - Black drawing salve.
Anybody else here subjected to that stuff?? To this day I can conjure up THAT smell.