“If they wad drink nettles in March  
And eat muggons in May,  
Sae mony braw maidens  
Wadna gang tae the clay”.

According to <<https://www.dsl.ac.uk/entry/snd/muggins>> muggons or muggins are Scottish dialect for mugwort which, along with nettles, was used as a prescription against tuberculosis.

The notes explain that "bars 17 - 24 are taken from an adaptation of Hooper's Jig for four couples that I made for demonstration purposes. They seemed interesting enough to exist in a dance of their own."