future biographer
... that Richard Wagner considered his future biographer to be "a bit over-excited for the level of his education"?
... that <a href="./Richard_Wagner" id="mwnw" rel="mw:WikiLink" title="Richard Wagner">Richard Wagner</a> considered his <b id="mwoA"><a href="./Ferdinand_Praeger" id="mwoQ" rel="mw:WikiLink" title="Ferdinand Praeger">future biographer</a></b> to be "a bit over-excited for the level of his education"?