Complex sentence: He published "The Pencil of Nature" (1844--46), which was illustrated with original salted paper prints from his calotype negatives, and made some important early photographs of Oxford, Paris, Reading, and York.
Split into simpler sentences: He published "The Pencil of Nature" (1844), which was illustrated with original prints from some of his calotype negatives. Additionally, he made some important early photographs of Oxford, Paris, Reading, and York.