Original sentence: And as he had reached the top of the mountain, he saw the blue sky above him an the cloud beneath like a white sea, from which flashes pierced as well directly up into the sky (sprite (lightning)) and shot down to the earth
Edited sentence: And as he had reached the top of the mountain, he saw the blue sky above him an the cloud beneath like a white sea, from which flashes mounted as well directly up into the sky (sprite (lightning)) and shot down to the earth