During their first years of marriage, described in "The First Four Years", the Wilders were plagued by bad weather, illness, and large debts. In the spring of 1888, Wilder and his wife were both stricken with diphtheria. Although they both survived, Wilder suffered from one of the less common, late complications of the illness, neuritis. Areas of his legs were temporarily paralyzed, and even after the paralysis had resolved, he needed a cane to walk. His inability to perform the hard physical labor associated with wheat farming in South Dakota, combined with a lengthy drought in the late 1880s and early 1890s, further contributed to the Wilders' downward spiral into debt and poverty.