Original sentence: His work was said to be superior to that of any other poet who graduated at the Eisteddfod at Caerwys, but he refused to graduate and followed this up by destroying  what he had written, which he described as 'vanity'
Edited sentence: His work was said to be superior to that of any other poet who graduated at the Eisteddfod at Caerwys, but unfortunately he himself refused to graduate and followed this up by destroying  what he had written, which he described as 'vanity'