Art Out-of-Doors 
principles of catholic good taste. Jager’s is, 
perhaps, the best historical work, although it 
hardly touches upon early periods, and is not 
altogether trustworthy with regard to later 
ones. In the pages of Garden and Forest 
(Vols. II. and III., 1889 and 1890) I tried 
myself to sketch an outline of the history of 
the art of gardening, and covered, as best 
I could, the earlier periods, about which 
little (indeed I may say nothing of a de- 
tailed and systematic sort) had been writ- 
ten. For later times the materials are much 
more abundant, but the day has not yet 
come when I could carry on my little survey 
so as to cover them also. 
As to books which inculcate a loving ob- 
servation of natural beauty, I must cite again 
those of Thoreau especially, and of Jefferies 
and Burroughs ; refer to Wordsworth and to 
Emerson ; note Sir John Lubbock’s “ Beau- 
ties of Nature” and Professor Shaler’s 
“ Aspects of the Earth and add the names 
of Charles C. Abbott, William Hamilton 
Gibson, Bradford Torrey, Hamilton Wright 
Mabie, and Wilson Flagg — all American 
writers of to-day. Valuable help toward 
390 
