Correspondence--United States--1910-1920 2 World War, 1914-1918--Personal correspondence 2 Gibbon, John H. (John Heysham), 1871-1956 1 Gibbon, John Heysham Jr., 1903-1973 1 Gibbon, John, 1827-1896 1 Influenza epidemic, 1918-1919--United States--History 1 Jefferson Medical College--History 1 more ... Personal Correspondence 1 Social life and customs--20th century 1 Soldiers--Pennsylvania--Philadelphia--20th century 1 United States--History--Civil War, 1861-1865--Correspondence 1 World War, 1914-1918--Home front 1 World War, 1914-1918--Hospitals--France 1 World War, 1914-1918--Personal narratives, American 1 Young, Samuel Baldwin Marks, 1840-1924 1 less ...