Helena Maria Elisabeth De Jong was a Dutch art historian who completed her doctoral dissertation on Michael Maier's Atalanta Fugiens at the University of Utrecht in 1965, publishing it in Dutch as Michael Maier's Atalanta Fugiens: Bronnen van een alchemistisch emblemenboek. The expanded English edition, published by E.J. Brill in Leiden in 1969, remains the foundational study of Maier's emblem book and the single most important work in Atalanta Fugiens scholarship. De Jong's interest in iconology led her from conventional art history into the study of alchemical emblems, where she discovered a field requiring expertise in classical philology, medieval textual traditions, and the history of science alongside visual analysis.

De Jong's method was source-critical in the tradition of Dutch art history: systematic, archival, and exhaustive. Rather than offering a general interpretation of Maier's alchemical philosophy or a psychological reading in the Jungian mode, she set out to identify the precise textual sources behind each of the fifty emblems. For every motto, discourse argument, and iconographic motif, De Jong traced the specific passages in the Turba Philosophorum, the Rosarium Philosophorum, the Aurora Consurgens, the Pseudo-Aristotelian Tractatulus, Ovid's Metamorphoses, and dozens of other classical and alchemical texts that Maier quoted, paraphrased, or transformed. This source-critical approach was unprecedented in alchemical scholarship, which had previously treated emblem books as self-contained artistic or mystical statements rather than as compilations with traceable textual genealogies.

De Jong's central discovery was that Maier was not an original alchemical theorist but a supremely learned compiler and re-interpreter of inherited traditions. She demonstrated that virtually every element of the Atalanta Fugiens can be traced to identifiable passages in the medieval and Renaissance alchemical corpus. The Turba Philosophorum emerges as Maier's single most prolific source (contributing nine mottos), followed by the Rosarium Philosophorum, the Tabula Smaragdina, and the Allegoria Merlini. De Jong mapped these source relationships emblem by emblem, creating a concordance that reveals the architecture of Maier's extraordinary erudition. As the RIDE review of Furnace and Fugue noted in 2023, De Jong's 1969 study "remains the only substantive scholarly examination of Maier's text" more than half a century after its publication.

Perhaps De Jong's most distinctive intellectual contribution is her demonstration that alchemical terms operate simultaneously across multiple registers: material (laboratory operations), medical (humoral pathology), spiritual (psychological transformation), and cosmological (planetary correspondences). She showed that a concept like Nigredo carries meaning as a chemical process (blackening through putrefaction), a medical condition (saturnine melancholia), a spiritual state (the dark night of the soul), and a cosmological principle (Saturn's dominion over prima materia). This multi-register model has become the standard framework for understanding alchemical symbolism and has influenced scholars across disciplines.

This site is fundamentally a showcase of De Jong's findings. Every emblem page's source analysis, every dictionary term's alchemical significance, every source authority identification, and the multi-register definitions all derive from her meticulous scholarship. Without De Jong's work, the textual traditions behind the Atalanta Fugiens would remain opaque to modern readers, and the systematic connections between Maier's emblems and their medieval antecedents would be invisible.