Sentence:  It seems clear that Chatterton worke out a theory of the history of English drama that would cilminate in Rowley's "Ælla". We have inferred a similar theory of prosodic history from the uncertainty and irregularity of pre-<WSD>Rowleyan</WSD> prosody as compared to Rowley's correctness. 
Meaning of the word marked with <WSD> tags:  Relating to the literary persona of Thomas Rowley.