Finally there is a series of signs involving rods which appear in the entries to Galleries B and C. Breuil interpreted this type of sign in relation to the topographical changes within the sanctuary, which is possible: they could be marks which the initiates followed, or which warned them of possible dangers such as clefts.[16] Certainly the difficult areas of the cave when visited can be negotiated more easily thereby. For Leroi-Gourhan, they are male symbols in binary relation to the cave itself, which represents the female principle (discussed below).