Note: For schoolchildren and their teachers Series editor Katharine Lee Bates writes in "Introduction to the Series", A Christmas Carol, page 5-6 (e-copy at HathiTrust): "The series of Canterbury Classics aims to bear its share in acquainting school children with literature ... These texts will be furnished with a modest amount of apparatus hidden away at the end of the book. ..." See A Christmas Carol for instance of that apparatus by its editor Katharine Gill West, which constitutes 20 pages where story spans 127.