Asterisk denotes entries on real places.
Winnemac.
Wheatsylvania. Leora’s North Dakota hometown, located in Crynssen County in the Pony River valley, twenty-four miles from Leopolis. Martin marries Leora there after traveling across the country on a whim to see her; after his internship they return so that he may set up his medical practice, for which he initially rents a one-story shack a half block from Main Street. Martin never fits in there, however, as he is always regarded with suspicion in spite and because of his efforts to improve local standards of hygiene and medical treatment.
Nautilus. Iowa city with a population of 70,000, where Martin goes to work for the Department of Public Health on the rebound from Wheatsylvania. He finds this town more progressive, although the agricultural technology whose manufacture drives its economy is a trifle hidebound, as indicated by the prominence of the Steel Windmill Company and the fact that Nautilus is the headquarters of Cornbelt Co-operative Insurance. Martin thrives there, becoming director of public health when Almus Pickerbaugh becomes the first scientist ever elected to the U.S. Congress; however, he makes enemies when he demolishes a block of tenements as a health hazard.
*New York City. Location of the McGurk Institute, where Martin goes to work after spending a year in the Rouncefield Clinic in Chicago. The institute allows him freedom to do the fundamental research he has always craved, alongside his old teacher Max Gottlieb, who came there after an unsatisfying stint with the pharmaceutical company Dawson T. Hunziker & Company of Pittsburgh. Martin and Leora rent a three-room apartment overlooking Gramercy Park and are gradually absorbed into the society of the institute via McGurk Scientific Dinners. After the institute takes up military research in World War I, Martin becomes increasingly disaffected in the face of pressure to direct his work to more immediately practical ends. Although his experiments with bacteriophages get positive results, he is not the same man when he returns to New York–without Leora–after testing the efficacy of his methods in the field. Although his second marriage to Joyce Lanyon anchors him in New York for a while, his new work on pneumococcus is subject to so many tribulations that his departure becomes as inevitable as his abandonment of Wheatsylvania and Nautilus.
St. Hubert. Fictional island south of Barbados in the West Indies, with a population of about 100,000; an outpost of the British Empire. When the Pendown Castle imports plague to Point Carib and the capital, Blackwater, the colonial governor and the feud-riven house of assembly are slow to react, thus turning the crisis into a disaster and providing a perfect natural laboratory for Martin to test the efficacy of his bacteriophages.
Birdies’ Rest. Mean residence beside a Vermont lake where Martin and Terry Wickett eke out the latter stages of their careers.