57831
One wall of the great tower , various parts of the outer bailey and the battlements were destroyed , but not before the building was surveyed by the antiquarian William Dugdale , who published his results in 1656 .
 William Dugdale
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 William Dugdale