Sally Sebald is the sister of Gustav Sebald and is managing the Sebald estate after her brother was killed. She helped Gustav film Zombies in the Snow, a coded film that Dr. Monty takes the Baudelaire orphans to see. In the Netflix show, she appears to be replaced with Jacquelyn. She wrote a letter to Lemony Snicket saying that she was thrilled to receive the news that he was alive and Dr. Orwell was dead [1]. The rest of the article talks about filming the movie. There was one picture of 3 orphans. Some people think they are the Quagmires. Others think they are the Snickets.