Complex sentence: In "The Magical Mimics in Oz" (1946), Jack Snow wrote that Pastoria had adopted Ozma as a baby fairy; this explains why the series contains no mention of her mother.
Split into simpler sentences: In "The Magical Mimics in Oz" (1946), Jack Snow wrote that Pastoria had adopted Ozma as a baby fairy. This explains why the series contains no mention of her mother.