A river flowed from Eden to water the garden, and from there it divided to make four streams. The first is named the Pishon, and this winds all through the land of Havilah where there is gold….The second river is named the Gihon, and this winds all through the land of Cush. The third is named the Tigris, and this flows to the east of Ashur. The fourth river is the Euphrates.
New Jerusalem Bible
The title of my book refers to the Pishon, the only river mentioned in the second creation story of Genesis whose location has not been identified. Various theories include the Nile; a now-dry channel running from Medina to Kuwait; and even the Danube, associated with this mosaic in Qatr, Libya, perhaps depicting a thirsty pilgrim, or Adam (© livius.org).