These drawings were made on pages 32 & 17, and pages 42 & 39 of a book on astronomy by Joannis de Sacro Bosco, Sphaera, Lyon France, 1564. The original pages were perforated by termite holes that were filled with gold leaf. The pages themselves have engravings and marginalia that Macia has incorporated into his new images. The relief elements were cut from other pages in the book. -- Source of annotation: Marvin or Ruth Sackner.