'Sister Agatha!' she exclaimed the next moment, 'Sister Agatha!'
'What is the matter now?' asked Sister Agatha, with a smile.
'Do come here!' cried Mary excitedly; 'do come here! Look!' she said, pointing out at the window; 'there are two skies. This is a wonderful place!'
'I only see one,' answered Sister Agatha, coming to her side.
'But look! there are two. There's one up above and another down there.'
'That is the sea,' said Sister Agatha. 'Haven't you seen the sea before? But, of course, you have not. Yes,' said Sister Agatha quietly, as she placed a hand on Mary's shoulder, 'the sea is very wonderful!'
'What is the sea?' asked Mary.
'A great, great piece of water——'
'The same as we drink?' asked Mary.
'It would not be at all nice to drink,' was the answer. 'It would taste salt, you know.'