The present work ÒAt the School of ConceptsÓ was written by Oskar Ernst Bernhardt (1875 - 1941), who published his most important works under the pseudonym Abdruschin. However, Bernhardt also used other pseudonyms and published ÒAt the School of ConceptsÓ in the 1920s under the pseudonym E. Reinhart., Susanne Schwartzkopff, Abdruschin, Im Lichte der Wahrheit, E.Reinhart, grailsmessage, Gralsbotschaft, Oskar Ernst Bernhardt| | 79PAGES