Patricia Highsmith, Muriel Spark and the cat …

Patricia Highsmith's diaries were published late last year and there are references to her friend Muriel Spark and the cat, Spider, that passed between them. There is also reference to a review Highsmith wrote on The Hothouse by the East River - intriguing. I must check that out. Highsmith is pictured holding a cat on the cover - was that Spider I wonder?