Following the initial work in the Cardiopulmonary Sciences laboratory, Beckett began to apply endoscopy in concert with radiography on the Max Uhle collection of mummies from Pachacamac Peru at the University of Pennsylvania in Philadelphia, Pennsylvania.
The Huari, the Pachacamac empire, Chancay, Chimor and Ichma possessed the city of Pachacamac at some point but it is unknown if any other peoples, apart from the Ichma, worshipped the Pacha Kamaq deity.