Ben Macdhui footsteps

I was returning from the cairn on the summit in a mist when I began to think I heard something else than merely the noise of my own footsteps. Every few steps I took, I heard a crunch and then another crunch, as if someone was walking after me but taking steps three or four times the length of my own. I said to myself, this is all nonsense. I listened and heard it again but could see nothing in the mist. As I walked on and the eerie crunch, crunch sounded behind me I was seized with terror and took to my heels, staggering blindly among the boulders for four or five miles nearly down to Rothiemurchus forest. Whatever you make of it I do not know, but there is something very queer about the top of Ben MacDui and I will not go back there again myself, I know.