Jan Hanuš Máchal, The Mythology of All Races/Volume 3 (1918)
“ It must further be borne in mind that the extant data treat of the period immediately preceding the introduction of Christianity, when the Slavic nations, inhabiting a wide-spread region and already possessed of some degree of civilization, had made considerable progress from their primeval culture. Hence no inferences may be drawn from the mythology of one Slavic nation as to the religion of the Slavs as a whole. ”
