Sentence:  The Irish and Ireland people (who are frequently troubled with lice, and such as will fly, as they say, in summer) anoint their shirts with <WSD>saffron</WSD>, and to very good purpose, to drive away the lice, but after six months they wash their shirts again, putting fresh <WSD>saffron</WSD> into the lye. 
Meaning of the word marked with <WSD> tags:  A spice (seasoning) and colouring agent made from the stigma and part of the style of the plant, sometimes or formerly also used as a dye and insect repellent.