Background - Repertory mistakes in modern homeopathy have been pointed out since the early years after the publication of the sixth edition of Kent’s repertory. A structural error of many current repertories is the use of Kent’s repertory as a basic information source. ‘Fear of ghosts’ is widely considered to be a symptom of Lycopodium clavatum by the homeopathic community.Objectives - To demonstrate that the source of ‘fear of ghosts’ in Lycopodium clavatum was an inaccurate translation, that has been spread by secondary sources and to review Hahnemann’s conception and efforts towards a reliable repertory.Results - The symptom ‘fear of ghosts’ does not exist in the primary source, being the product of a misunderstanding of the English translation of Hahnemann’s original record, ‘fear of frightful imaginary images’. Hahnemann’s efforts to compile a reliable and complete dictionary of Materia Medica were also briefly presented, as well as Rückert’s repertory, which, in addition to collating and classifying symptoms in alphabetical rubrics and sub-rubrics, displayed them completely, as registered in primary sources.Conclusion - The misunderstanding about ‘fear of ghosts’ in Lycopodium clavatum exemplifies how distant current homeopathic information is from its primary sources and from Hahnemann’s ideal of a symptom-lexicon. In spite of its technical limitations, Rückert’s repertory, which was strongly recommended by Hahnemann, can be considered as a template for new repertories based on primary sources.