I want to use large excerpts from an old book in the textbook I am writing (e.g. 500-1000 word chunks at a time taken). These will serve as primary sources for the students to analyze.
The first version was originally written in Spanish in the 1500s.
It was subsequently translated into English and I can find various old scans from the 1800s in Archive.org.
If one searches the book on Amazon.com, there are many people still publishing various translated versions of this really old book.
Can I safely copy and paste the passages from the 1800s as they should be under public domain?
Or does the fact that publishers are still publishing this book mean it still is protected?