English: Henry H. Riggs (March 2, 1875 - August 17, 1943) was a Christian missionary stationed in Kharpert during the Armenian Genocide. In his book Days of Tragedy in Armenia: Personal Experiences in Harpoot, 1915-1917, Riggs provides an important detailed eye-witness account of the Genocide and concluded that the deportation of Armenians was part of an extermination program organized by the Ottoman government. The book is considered to be one of the most detail accounts of the Armenian Genocide in the English language