Elise had found this book and posted it some time ago in the
google-book thread. The book is called "Guide For Drawing the Acanthus". It is dated 1886. The drawing tutorials are good and teach how to draw some of the most beautiful Acanthus leaves. I also noticed a section toward the end titled Arabesque. It is interesting to read through that.
View the book on-line
Download it as a pdf to your harddrive
There is good detail if you zoom in on the various plates.
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