English: Map of the Regency of Algiers, kabyle's states and others Sultanates of Algeria in 18th century. Own Work Based on euratlas.net [1] and various historicals books as "L'Algérie des Algériens" by Mahfoud Kaddache. It also represents the road Algiers-Constantine punctuated by the strategic shift of Tiggoura (Iron Gates) where the Regency of Algiers pay a toll to a local sultan. The source for "Tigourarin" is Rachid Bellil, Les oasis du Gourara (Sahara algérien), Peeters Publishers, 1 janv. 1999 - 307 pages, in p.133, in the book the moroccan traveler Al Ayachi reports that there was an independent emirate in the "Tigourarin" (now called Gourara). The Twat is designated in the book as a groupe of oases.