fludd was not a member of the rosicrucians, as often alleged, but he defended their thoughts as expressed in numerous manifestos and pamphlets. he produced a quick work, the "apologia compendiaria", against the claims of libavius that the rosicrucians indulged in heresy, diabolical magic and sedition, made in his "analysis confessionis fraternitatis de rosea cruce" (analysis of the confession of the rosy cross) of 1615. fludd returned to the subject at greater length, the following year.