This book contains a selection from my writings on Art extending over a period of twenty years. Some essays have never before been published in England; and I have also added a good deal of new matter and made slight corrections throughout. In the laborious work of hunting up lost and forgotten publications, and in the work of selection, revision, and arrangement I owe everything to Mr. R. R. Tatlock’s devoted and patient labour. DEDICATED TO MY SISTER MARGERY WITHOUT WHOSE GENTLE BUT PERSISTENT PRESSURE THIS BOOK WOULD NEVER HAVE BEEN MADE