In other places, the author has used brief notes rather than grammatically correct prose. These appear to have been hasty jottings, and have been retained.
Page 75: 'fatigueing' corrected to 'fatiguing'.
"We have no word-symbols for defining those delicate shades of difference so important to the artist, and to be perpetually qualifying is fatiguing."
Page 78, Footnote 4: 'Cooper' corrected to 'Cowper'. (Reference: Wikipedia)
"... by some of our ablest men of the younger school, such as Mr. Payne and Mr. Cadogan Cowper,...". Index entry is correct.
Page 174: 'droping' corrected to 'dropping'.
"by the use of the brush in floating or dropping on the forms of the ornament."
Page 241: 'intance' corrected to 'instance'.
"... different points of view—for instance, (1) as an accessory...."