Individual degree meaning is a later layer over a much older, planet only system. Vettius Valens, writing in Greek around the year 175, divided each sign into three ten degree faces under a rotating planetary sequence, and this degree opens Taurus's second decan, ruled by Mercury rather than by Venus, while Ptolemy's Tetrabiblos separately keeps this degree under Mercury's bound as well, the two ancient systems agreeing here. Neither writer pictured a degree, only ruled it. A complete run of individual degree pictures first survives whole in 1494, in Johannes Angelus's Astrolabium Planum, a Latin work safely public domain, though its old English translations are not.
The next complete English set is Welsh minister John Thomas's, writing as Charubel, whose 1898 book gives this degree an anchor unattached to any vessel's chain, its hook fast to a rock but its cable broken, a picture of security that has quietly become disconnected from what it was meant to hold. Marc Edmund Jones and the clairvoyant Elsie Wheeler produced a separate image for this same degree in 1925, now generally read through Dane Rudhyar's 1973 restatement. In practice, this degree is mostly used to time events through a progressed Sun, Moon or angle reaching it exactly, or to flag two charts sharing it in synastry.