2014 is the quincentenary of the birth of John Knox and the article is part of an attempt to contextualise him and assess his impact. In the autumn of 1552 Knox preached a ferocious sermon at Windsor in the presence of the young King Edward VI. The sermon threatened to derail the careful compromise of the Second Prayer Book of Edward VI and provoked a sharp reply from Archbishop Thomas Cranmer to the Privy Council. The so-called Black Rubric (arguably produced by Cranmer) which clarified the intention of the posture of the recipient at communion was added to the Second Prayer Book. Though Cranmer's withering response might have been taken to have demolished Knox's peculiar insistence that the Reformed communion should mirror the posture of the disciples at the Last Supper, the issue reappeared a generation later when James VI and I attempted to require recipients to kneel to receive communion in the Articles of Perth of 1618. The Knox–Cranmer dispute had a rerun in the conflicting pamphlets of David Calderwood and John Forbes of Corse. In theological terms, John Forbes has the better arguments, but by that stage aspects of a style and tone of Scottish worship had become customary and prevail to this day. It is those aspects of table fellowship which form Knox's continuing legacy.