Fig. 3: View of selected dividers in ZK 19: “Religion – Myth”, “Mythology pragmatic”, “Venus and her entourage”, “Ancient Superstition Afterlife”, “Mysteries”. © Warburg Institute

Somewhat curious of the dates/times of the creation of these tabbed cards. Surely made in the 20th century, but since Warburg was likely creating notes in the late 1800s, where does this sit with respect to the invention of the tab card in 1894 claimed by Progressive Indexing and Filing (Remington Rand, 1950, p205)?
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