Read the passage. excerpt from "A Ghost Story" in Sketches New and Old by Mark Twain

I slept profoundly, but how long I do not know. All at once I found myself awake, and filled with a shuddering expectancy. All was still. All but my own heart — I could hear it beat. Presently the bedclothes began to slip away slowly toward the foot of the bed, as if some one were pulling them! I could not stir; I could not speak. Still the blankets slipped deliberately away, till my breast was uncovered. Then with a great effort I seized them and drew them over my head. I waited, listened, waited. Once more that steady pull began, and once more I lay torpid a century of dragging seconds till my breast was naked again. At last I roused my energies and snatched the covers back to their place and held them with a strong grip. I waited. By and by I felt a faint tug, and took a fresh grip. The tug strengthened to a steady strain — it grew stronger and stronger. My hold parted, and for the third time the blankets slid away. I groaned. An answering groan came from the foot of the bed! Beaded drops of sweat stood upon my forehead. I was more dead than alive. Presently I heard a heavy footstep in my room — the step of an elephant it seemed to me — it was not like anything human. But it was moving from me — there was relief in that. I heard it approach the door — pass out without moving bolt or lock — and wander away among the dismal corridors, straining the floors and joists till they creaked again as it passed — and then silence reigned once more.

When my excitement had calmed, I said to myself, "This is a dream — simply a hideous dream." And so I lay thinking it over until I convinced myself that it was a dream, and then a comforting laugh relaxed my lips and I was happy again. I got up and struck a light; and when I found the locks and bolts were just as I had left them, another soothing laugh welled in my heart and rippled from my lips. I took my pipe and lit it, and was just sitting down before the fire, when — down went the pipe out of my nerveless fingers, the blood forsook my cheeks, and my placid breathing was cut short with a gasp! In the ashes on the hearth, side by side with my own bare footprint, was another, so vast that in comparison, mine was but an infant's! Then I had had a visitor, and the elephant tread was explained.
Which image best conveys a chilling mood?

"...so vast that in comparison, mine was but an infant's!"

"...I found the locks and bolts were just as I left them,..."

"I waited. By and by I felt a faint tug, and took a fresh grip."

"All was still. All but my own heart--I could hear it beat."