XEE4140514 Light signals: the shipwrecks. A man hangs a lantern between the horns of a cow and walks along the coast to make the boats believe that they are still far from the rocks and thus provoke their sinking to recover the wreck. Anonymous illustration from 1925. Private collection. by Anonymous; Private Collection; (add.info.: Light signals: the shipwrecks. A man hangs a lantern between the horns of a cow and walks along the coast to make the boats believe that they are still far from the rocks and thus provoke their sinking to recover the wreck. Anonymous illustration from 1925. Private collection.); Stefano Bianchetti.