The work of Fredi Casco has been investigating the archives for some time, combining montage and the alteration of documents. The title of this work comes from an expression that he found in the fieldwork diary of Valentina Bonifacio, where one of the testimonies spoke of "bicho ra'anga". The word "ta'anga" in Guarani means image, but also appearance, seduction, figure. When Casco read this he quickly associated it with his own procedure: to bring to presence that which couldn’t be seen, an anomaly that makes the official document say something of what it hides.
The intervened documents were found by Valentina Bonifacio in the ruins of the ex-factory in 2008. They were in a visible state of abandonment, scattered on the ground and sharing the space with pack animals. They were part of a larger archive that was destroyed by the company Victoria Paraguay S.A., after several years of abandonment. These documents here are the last remaining of that larger archive.