Place and context. A southern Cape cave in South Africa with several Middle Stone Age occupation phases. We treat three findings as related research questions but separate pieces of evidence: (a) two abalone shells with a prepared ochre-rich mixture and associated grinding/processing materials from a roughly 100 ka context; (b) deliberately incised ochre pieces from contexts spanning approximately 100–75 ka; and (c) a cross-hatched red ochre drawing on a silcrete flake from about 73 ka. Henshilwood et al., ochre processing, Science 334 (2011); Henshilwood et al., engraved ochres, Journal of Human Evolution 57 (2009); Henshilwood et al., drawing, Nature 562 (2018).
What was dated. Optical luminescence dates on quartz grains in cave sediments establish ages for occupation phases rather than directly dating each mark or mixture. The published chronology reports phase M3 around 98.9 ± 4.5 ka and phase M1 around 72.7 ± 3.1 ka; the engraved ochre assemblage spans more than one phase. These are archaeological associations, with errors, not single exact event dates. Jacobs, Duller and Wintle, Journal of Human Evolution 51 (2006).
Claims. observed: intentionally prepared pigment mixture, recurring engraved marks, and an intentionally drawn cross-hatched pattern as described by their excavators and analysts. inferred: learned techniques and persistent practices of mark-making across occupations. open: whether a particular mark functioned as an identity sign, a memory aid, decoration, or something else; the purpose of the liquid mixture is likewise unknown. Red ochre's presence does not establish one continuous spiritual meaning across the site's different phases.
Next discriminating work. Record excavation phase and specimen number for each mark separately. Compare the marks' construction sequences, rather than just their visual similarity, with securely dated marks from other sites. Track practical and symbolic explanations of pigment use together.