"Here comes Doctor Barbosa, papa," said Martim. "I wonder if he will go around the gardens with us." "Perhaps he will, if he is not too busy. If he does, he can tell you all about the trees and flowers for he has explored the country along the Amazon and knows all about the Brazilian flora." As the Senhor spoke, Doctor Barbosa came up smiling, for he and Senhor Lopez were old friends. "You have quite a bevy of little folk with you to-day," he said pleasantly. "This is my nephew, Affonzo Diaz, Doctor Barbosa," said the Senhor. "And these girls are my nieces, Charlotta and Maria. Of course you know Martim." "I am very glad to see you all," said the doctor with a smile. "This is the first visit of Affonzo and his sister to our city," said Senhor Lopez. "Indeed," replied the doctor. "I really think then that you should let me help show them around the gardens. I have a few moments of leisure just now, that I will be glad to devote to you." "That will be delightful," said the Senhor. "You know so much about this place and I so little that I am sure the children will much prefer you as a guide." Bowing in appreciation of the compliment, the doctor led the party down the avenue. "These gardens," he said, pointing down across the avenue, "as you see, are on the border of a large sheet of water. That is called the Lagoa de Rodrigo Freitas, and is separated from the sea only by a narrow strip of sand." "What are those crooked, twisted trees," asked Lola, as they passed into another long avenue. "They are mangoes. They are not very handsome to look at, but you know what delicious fruit they bear." "Indeed I do," said Lola. "This," said the doctor, pointing to a tall palm beside the pathway, "is a Bahia palm. It is from trees of this kind that your brooms and brushes at home are made." Next they saw the great candelabra tree. "It looks," said Maria, "as if it were already to be lighted for church, doesn't it?" "See the beautiful grove of orange trees," said the Senhor. "Oh yes," said Affonzo. "And the trees have both fruit and blossoms on them." "That is not at all uncommon with many of our tropical fruit trees," said Doctor Barbosa. "Many of the trees here," he continued, "are useful for other purposes than fruit-bearing. There is the cow tree over yonder. Its sap looks like milk, and when exposed to the air is soon changed to glue, and from this a useful cement is made." As the party approached a little lake in the centre of the gardens, they saw a small eight-sided pavilion. On its top was a bust. "Whose statue is that?" asked Affonzo. "If you will step closer, you can read the inscription on the tablet," said the doctor. "And that will answer your question." "To the Memory of Friar Leandro do Sacramento of the Order of Carmelites, a graduate in the natural sciences at the University of Coimbra, first professor of botany in the School of Medicine in Rio, and first technical director of the Botanical Gardens."