 However, there are still a few small groups of devotees, such as "a strange Bolivian cult called the Daughters of Ummo".Jacques Vallée has said that the author(s) of the Ummo documents might be a real-world analogue of the fictional creators of Borges' "Tlön, Uqbar, Orbis Tertius".Historian Mike Dash writes that Ummoism began on February 6, 1966, in Madrid.