Albert Bigelow Paine,
The Boys' Life of Mark Twain — Chapter 5
(1916)
“ Then, suddenly, they could hardly believe their eyes; a little way above the road the boulder struck a projection, made one mighty leap into the air, sailed clear over the negro and his mule, and landed in the soft dirt beyond the road, only a fragment striking the shop, damaging, but not wrecking it. Half buried in the ground, the great stone lay there for nearly forty years; then it was broken up. It was the last rock the boys ever rolled down. Nearly sixty years later John Briggs and Mark Twain walked across Holliday's Hill and looked down toward the river road. ”
