The narrowed entryway to the Apse is flanked by two outcroppings of the wall. The one on the left, which is more pronounced, is covered with a number of figures. At eye level, we can make out the well-defined outline of a horse. In fact, the figure is somewhat more complicated – closer observation reveals that this silhouette merges with another depiction of a horse, identified by a second head and neck, and a third rear limb.
Two quadrangular signs, one complete and the other a sketch, cover the animal's flank. But the most enigmatic signs are the two "claviform" (or club-shaped) signs, which consist of a straight line and a central bulge.
This sign has no equivalent, either elsewhere in Lascaux or in any neighbouring shelter or cave.