21.   This produced what the authors described as the first direct clinical measurements of immune-system activity both in AIDS patients and an uninfected control group.

22.   Thus the author describes leaving for the United States in this touching personal coming-of-age memoir.

23.   Authors such as Strabo describe the geographic location of the cities and their rich lifestyle, while others, such as Seneca, condemn their moral corruption.

24.   The British author described a rich, isolated Tibetan valley overseen by a wizened high lama.

25.   Out on bail awaiting trial, Musotto accompanies his friend Micciche round Cefalu, a picturesque fishing village described by author Lawrence Durrell.