In his prologue to the first Argentine edition of Eduardo Barrios' novel Un perdido, Manuel Gálvez sets forth a number of germinal ideas. One of these is that Lucho Bernales, the perdido of Barrios' fictional creation, is a “brother” to Gálvez' own Carlos Riga of El mal metafísico; and furthermore he proposes certain literary sources for both characters. It is the present purpose to examine these two suggestions, testing their adequacy, then passing on to inquire whether a pattern of thought may not be detected and whether other important novels may not be related to the questions thus raised.