Queries, humbly proposed, to the Right Reverend and Right Honourable Count Zinzendorf

This letter / publication is written from John Wesley to Count Zinzendorf, founder of the 'Moravian Church' (a title which Wesley claims to be false), a group who also call themselves 'The Brethren'. The short book sees Wesley addressing both the theological problems with the Brethren, and also some of the more bizarre charges which can be set against this cult, including behaving 'like a mad-house', 'breaking wind into a tea-cup', and writing hymns to the male genitalia (which are quoted in the letter until Wesley cannot bring himself to repeat any more). 

While this is not one of Wesley's better known works or letters, it is certainly a contender for being the most strange, bizarre and outrageous ones, addressing the outlandish behaviours of a Christian Cult which has similar equivalents in the modern day culture of the west.