http://book.klll.cc/ebooks/author/45957.opds?sort_order=release_date 2025-11-19T05:56:09Z Books by Arnold, Brother Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-19T05:56:09Z https://book.klll.cc/ebooks/50524.opds The Letter of Petrus Peregrinus on the Magnet, A.D. 1269 active 13th century de Maricourt Pierre