"You are doctor? They told me, could I but see one, well would I be," said the Sister. "At the convent we have only Sister Inez, with her small and old medicines."

"Yes, I think I may call myself doctor," answered Keith gravely. "What do you say, Carrington?"

"Knows no end, Miss, Miss—Miss Luke—I should say, Miss St. Luke. I am sure I do not know why I should stumble over it when St. John is a common enough name," answered Carrington, who generally did his thinking aloud.

"No end?" repeated the little Sister inquiringly. "But there is an end in this evil world to all things."

"Never mind what he says, señora," interrupted Keith, "but step out strongly and firmly, and throw back your head. There now, there are no crabs in sight, and the beach is hard as a floor. Try it with me: one, two; one, two."

So they treated her, partly as a child, partly as a gentle being of an inferior race. It was a new amusement, although a rather mild one Carrington said, to instruct this unformed, timid mind, to open the blinded eyes, and train the ignorant ears to listen to the melodies of nature.

"Do you not hear? It is like the roll of a grand organ," said Keith as they sat on the door-step one evening at sunset. The sky was dark; the wind had blown all day from the north to the south, and frightened the little Sister as she toiled at her lace-work, made on a cushion in the Spanish fashion, her lips mechanically repeating prayers meanwhile; for never had they such winds at the inland convent, embowered in its orange-trees. Now, as the deep, low roll of the waves sounded on the shore, Keith, who was listening to it with silent enjoyment, happened to look up and catch the pale, repressed nervousness of her face.

"Oh, not like an organ," she murmured. "This is a fearful sound; but an organ is sweet—soft and sweet. When Sister Teresa plays the evening hymn it is like the sighing of angels."

"But your organ is probably small, señora."

"We have not thought it small. It remains in our chapel, by the window of arches, and below we walk, at the hour of meditation, from the lime-tree to the white-rose bush, and back again, while the music sounds above. We have not thought it small, but large—yes, very large."