I think this might come out of the mummer's tradition? I have the tune & 1 verse I'm looking for more, can you help. The verse I have is this.

Jacky Rhubarb, Jacky Rhubarb, Jacky Rhubarb I tell.
I come here from Turkey to make you all well.
Don't you well know me for my name it is Dan
And I am a celebrated Jacky Rhubarb man.