Dogtrousers
Kilometre nibbler
They weren't, but we used to carry an old ammo tin with snacks and (if we had one) a camera. I never carried a camera down the cave with me, because the only camera I had in those days was a Zenith SLR that weighed half a ton (or seemed like it). I actually still have that camera, but haven't used it for at least 20 years.
Yup I had a Zenith which I never took underground for similar reasons. And a little instamatic thingy which I suppose might have found a place in an ammo box, but I never bothered as the pics would be guaranteed terrible. Plus it's a bit dark down there, so that would have meant faffing about with flash.