Bertha and her husband make their first visit to the Crystal Sea. Frank declines to go, and we find out later it is because they are welcoming their son and his wife at the shore there. I am puzzled why some arrive at the shore of the River of Life and others at the Crystal Sea, she doesn't seem to explain this, only that those there are a multitude there, standing on the shore, wearing spotless robes. Some also are carrying musical instruments made of gold; yes, harps are there. But why not? David played a harp and "it pleased the Lord."