each floor is mixed-sex with a shared bathroom. It has some of the largest rooms in Hitchcock Hall, and includes several rooms known as "octagons" which are located in a turret-like structure and have many windows overlooking 57th and Ellis. The basement entrance to this section opens up into the common area that connects Snell and Hitchcock. Section I also contains "horseshoe doubles" (room #1x7), large doubles with separate niches and closets for each resident. The horseshoe doubles also have a (nonworking) fireplace and large hearth. Section I was also home to noted astronomer, Emmy award winner, and Pulitzer and Hugo award-winning author Carl Sagan in the 1954–1955 academic year. Section V is built above the Green Room, a large lounge, which is properly known as the Charles Hitchcock Memorial Library. Unlike Section I the first two floors are alternating single-sex (female, then male) with the top floor remaining mixed-sex. Section V has some of the more unusual rooms in Hitchcock, including several which have their own names. On the second floor of section V is the "Fermi Room," where Enrico Fermi is said to have lived while working on the Manhattan Project in the 1940s. It is rumored that he chose that room because it had its own bathroom with tub; though the bathroom remains, the tub was replaced with a shower in 2008. Linked to the Fermi Room is the Fermi Blackboard, which is said to be the same blackboard Fermi used to do his calculations, although this may be an urban legend. This possibility does not, nevertheless, detract from many students' desire to possess it. On the fourth floor is "The Ranch" (room 541), a sprawling single which extends across the north side of the section. It overlooks the Regenstein Library and Ratner Athletic Center and on a clear day the Sears Tower can be seen in the distance. It is usually one of the most sought-after rooms in the House's annual housing lottery. The main lounge in Hitchcock, the Green Room, is a large reading room with tiled floor, a grand piano, a working fireplace, and portraits of namesake Charles Hitchcock, benefactor Annie Hitchcock, and University of Chicago patron Daniel Shorey. Hitchcock also has a kitchen, a bike storage room, and a laundry room. Each section has its own door onto Hitchcock's cloister (known as the Arcade), but the doors are used for exiting only and