Horse and rider emerged from dark to light and back again.
A lone rider had emerged from the mouth of the cave.
A rider emerged from the leading edge of the cloud.
A horse and rider emerged from the cherry trees onto the path.
He turned to join his two companions and three stood studying maps, trying to learn where the riders would emerge.
A half hour later, four riders emerged from the end of the gorge.
More riders emerged, spreading out along the river bank.
A dark rider had emerged suddenly from the woods.
As he pointed, a horse and rider emerged from the shadow of the forest.
His guess was confirmed when the first rider emerged from the shadows.