Pereira's book "The Lapis," held by the Sackner Archive, is analyzed in depth in the chapter on reconciling the inner-outer duality. This artist book "contains diagrams that allegedly provide the key to Pereira's geometric symbolism.. .sumptuously illustrated with paintings and diagrams...it is a record and self-analysis of two dreams" involving an oval stone of lapis lazuli and relating Pereira's fundamental assumption that society was evolving to a higher spatial consciousness. -- Source of annotation: Marvin or Ruth Sackner.