The tradition gives Markab the nature of Mars with Mercury, and Robson reads it for a keen, steady and enterprising mind together with the danger of cuts, blows, fire and shipwreck, the martial half supplying the hazard and the Mercurial half the sharpness. The specific catalogue of violent dangers is the usual late elaboration, to be treated as schematic rather than predictive. The dependable content is the star's position: a bright marker at one corner of the Great Square of Pegasus, part of a pattern that has served skywatchers as a signpost to the autumn constellations for as long as the sky has been mapped.
The specific hazards Robson lists for Markab, cuts, blows, fire and shipwreck, follow the same schematic Mars-supplies-the-danger, Mercury-supplies-the-instrument logic visible across the whole martial-mercurial group of stars in this catalogue, Bellatrix and Alshain among them, a formula the compiler seems to have applied fairly mechanically wherever the pairing recurred. No delineation earlier than the modern compiling tradition survives for Markab specifically, and its violent catalogue of dangers should be read, like similar lists elsewhere in this set of tables, as schematic nineteenth-century elaboration rather than ancient testimony.