Belloq crept carefully, not just wary of ice and holes hidden under the snow, but also the possibility of traps. The cave may just be a natural geological formation...but it might not be.

He shined his light onto the shadowed rock walls, illuminating all around the entranceway. There. On the right and roughly at eye level, there was a carving in the stone, half-hidden by dirt and snow.

"Ha!" Forgetting the lost explorers possibly injured and waiting within, Belloq stopped to examine the carving more closely, pulling a small round magnifying glass out of his pocket to look at the edges to assess the wear from erosion and hypothesize how long ago it was carved.