Read it through once

There was a season of quiet, now, but at the end of about three weeks Sir George Colley conceived the idea of climbing, with an infantry and artillery force, the steep and rugged mountain of Amajuba in the night—a bitter hard task, but he accomplished it. On the way he left about 200 men to guard a strategic point, and took about 400 up the mountain with him. When the sun rose in the morning, there was an unpleasant surprise for the Boers; yonder were the English troops visible on top of the mountain two or three miles away, and now their own position was at the mercy of the English artillery. The Boer chief resolved to retreat—up that mountain. He asked for volunteers, and got them.