to complete his carpentry apprenticeship. Riis returned to Ribe in 1868 at age 19. Discouraged by poor job availability in the region and Gjørtz's disfavor of his marriage proposal, Riis decided to emigrate to the United States. Migration to the United States Riis immigrated to America in 1870, when he was 21 years old, seeking employment as a carpenter. He first traveled in a small boat from Copenhagen to Glasgow, where on May 18 he boarded the steamer Iowa, traveling in steerage. He carried $40 donated by friends (he had paid $50 for the passage himself); a gold locket with a strand of Elisabeth's hair, presented by her mother; and letters of introduction to the Danish Consul, Mr. Goodall (later president of the American Bank Note Company), a friend of the family since his rescue from a shipwreck at Ribe. Riis disembarked in New York on June 5, on that day spending half of the $40 his friends had given him on a revolver for defense against human or animal predators. When Riis arrived in New York City, he was one of a large number of migrants and immigrants, seeking prosperity in a more industrialized environment, who came to urban areas during the years after the American Civil War. Twenty-four million people relocated to urban areas, causing their population to increase eightfold. The demographics of American urban areas became significantly more heterogeneous as many immigrants arrived, creating ethnic enclaves often more populous than many of the cities of their homelands. "In the 1880s 334,000 people were crammed into a single square mile of the Lower East Side, making it the most densely populated place on earth. They were packed into filthy, disease-ridden tenements, 10 or 15 to a room, and the well-off knew nothing about them and cared less." After five days, during which he used almost all his money, Riis found work as a carpenter at Brady's Bend Iron Works on the Allegheny River above Pittsburgh. After a few days of that, he began mining for increased pay but quickly resumed carpentry. Learning on July 19, 1870, that France had declared war on Germany, he expected that Denmark would join France to avenge the Prussian seizure of Schleswig, and determined to fight for France. He returned to New York, and, having pawned most of his possessions and without money, attempted to enlist at the French consulate, but was told