 Paranormal researcher John Grant Fuller Jr.'s 1968 book, "The Day of Saint Anthony's Fire" concluded that a form of ergot that "logically has to be akin to LSD" was the likely culprit but that we may never know for certain because toxicologists and doctors could not reach an agreement.Citing the opinion of toxicologists, Fuller asserts that the symptoms exhibited by victims in Pont-Saint-Esprit were not consistent with mercury poisoning.In his 2009 book, "A Terrible Mistake," journalist Hank P. Albarelli Jr alleges that the Special Operations Division of the Central Intelligence Agency (CIA) tested the use of LSD on the population of Pont-Saint-Esprit as part of its MKNAOMI chemical behavior program in a field test dubbed Project SPAN.