Not so with her son, however, and seeing that his mother, the doctor, and himself were thus treated simply because they had owed their admission to a servant, and sought admission at the servants' entrance, Frederick's admiration became tinged with a slight bitterness, the bitterness that had caused his ironical comment on the number of persons and horses devoted to the pleasure and service of a single individual. The sight of the magnificent gardens through which they were obliged to pass to reach the greenhouses soon made the lad forget his bitterness. The gardeners were no less numerous than the subordinates in the various other departments, and by inquiring for M. le chef of the gardens and conservatories, the visitors finally ascertained that this important personage was in the main conservatory. This building, which was circular in form, was two hundred feet in diameter, with a conical roof, the apex of which rose to a height of forty feet. This gigantic conservatory, constructed of iron, with remarkable boldness yet lightness of design, was filled with the most superb exotics. Banana-trees of all sizes and kinds, from the dwarf musa to the paradisiaca, rose to a height of thirty feet, with leaves many of them two yards in length. Here the green fans of the date-palm mingled with the tall stems of the sugar-cane and bamboos, while the clear water in a huge marble basin in the centre of the conservatory reflected all sorts of aquatic plants, among them great arums from India, with enormous round leaves, tall cyperus with their waving plumes, and the lotus of the Nile, with its immense azure flowers so intoxicating in their fragrance. A marvellous variety of vegetation of every shape and kind and colour had been collected here, from the pale mottled green of the begonia, to the richest hues of the maranta, with its wonderful leaves of green velvet underneath and purple satin on top; tall ficus side by side with ferns so delicate that the lace-like foliage seemed to be supported with thin strands of violet silk; here a strelitzia, with a flower that looked like a bird with orange wings and a lapis lazuli crest, vied in splendour with the astrapea, with its enormous cerise pompon, flecked with gold, while in many places the immense leaves of the banana-trees formed a natural arch which so effectually concealed the glass roof of the rotunda from view that one might have supposed oneself in a tropical forest. Marie Bastien and Frederick interchanged exclamations of surprise and admiration at every step. "Ah, Frederick, how delightful it is to see and touch these banana-trees and date-palms, we have read of so often in books of travel," cried Marie. "Mother, mother, here is the coffee-tree," exclaimed Frederick, in his turn, "and there, that plant with such thick leaves, climbing up that column, is the vanilla."