Classic paintings: everything used on Standard Ebooks productions is old enough to be in the US public domain. The artists are in the colophons if you want to find out more.
This book was published in 1946, and will therefore enter the U.S. public domain in 17 years on January 1, 2042.
however it seemed odd that apparently the work was done to prep it and notice appears elsewhere * that material offered is in the public domain .. and then this.
No great drama, it just caught my attention, I like the series and wanted to check the art and the copy against what I have here in book form.
Some placeholders like this one exist because they are part of other collections for which we have more items. So when the reader is viewing the other collection, they can see which items we have and which we don't.
I do love Odilon Redon, there was an excellent exhibition of his work in Copenhagen a few years ago that I managed to catch: https://www.glyptoteket.com/exhibition/odilon-redon-into-the... . Unfortunately etchings aren’t house style for covers, we typically go for oil or watercolour-indistinguishable-from-oil.