Search my internet broadside ballad index louse. Note 3 different versions of "The Taylor and the louse", the latest version of which has been collected as a traditional song (with mouse replacing louse). There is another there about a six legged creature. I think I also pointed out some other related drollery songs. 'A Taylor/Tailor is no man' was proverbial, and the only suitable creature who he was a match for in a fight was a louse. There another related song that I think is in DT, I'll go look it up.