Elizabeth Cook

SIR: Nicholas Tyacke, before pointing out what he sees as errors of emphasis and interpretation in Margot Heinemann’s Puritanism and Theatre, makes a general point about ‘a basic difficulty of interdisciplinary studies – namely, keeping up with more than one subject’ (Letters, 5 February). Doesn’t a lot of the difficulty derive from the way in which we conceive of ‘disciplines’ and ‘subjects’...