The 1925 picture attached to this degree has an older Welsh companion. Charubel, the working name of John Thomas, published an image for every zodiac degree in 1898, and for Leo 4 he described a carrier's waggon, one of those with the tarpaulin overhead. It is a deliberately humble scene for so royal a sign: not the king's coach but the working vehicle that moves other people's goods, covered against the weather, keeping its cargo dry on someone else's behalf.
Read against Leo, it suggests strength in service, the sign's warmth harnessed to carriage and protection rather than display, and the tarpaulin makes the point that what is carried matters enough to shelter. Charubel stands in a long line. The second century astrologer Vettius Valens gave each sign three planetary faces of ten degrees, Ptolemy recorded the unequal Egyptian bounds, and Johannes Angelus's Astrolabium Planum of 1494 preserves the first complete set of individual degree pictures, so the 1898 catalogue is a late chapter in an old project rather than an invention. In the older structural systems this degree remains in Leo's first decan under Saturn, within Jupiter's term, weight-bearing planets beneath the Sun's sign, which sits comfortably beside the loaded waggon. In use, a degree image of any lineage is read when a natal placement or a progression lands here, less a prediction than a picture to hold the placement against.