Sentence:  This account of a fictional "Merchester" pageant by the novelist Arthur Quiller-Couch in his Brother Copas (1911) was based on his own experience as a writer and actor — or <WSD>pageanteer</WSD>, in contemporary parlance — involved with the 1908 Winchester National Pageant. 
Meaning of the word marked with <WSD> tags:  One who produces a pageant.