His Majesty King William IV. signified his pleasure to become the Patron of the Society, and presented to it all the animals belonging to the royal menagerie in Windsor Park. This collection included fourteen wapiti, seven zebus, two mountain zebras, two Burchell’s zebras, and thirteen kangaroos, besides other animals and a valuable collection of birds. In 1831 the King presented to the Society the collection of animals in the Tower. The armadillos bred in the Gardens. An elephant paddock and pond were erected. In 1833 a parrot house was erected. In 1834 an additional space of ten acres of ground along the south-western verge of the South Garden was acquired. Examples of twelve species of mammals and twenty-six species of birds were exhibited for the first time. Of the former the most important was an Indian rhinoceros, for which the sum of £1,050 was paid. In 1835 a house was built for elephants and rhinoceros in the North Garden, near the spot where the present elephant house now stands. His Majesty the King presented to the Society a fine young Indian elephant. On May 24, 1836, four giraffes (three males and a female) arrived at the Gardens in charge of M. Thibaut, who had obtained them for the Society in Kordofan. They were the origin of the famous herd which died out in 1881. Of the seventeen giraffes of this herd subsequently born in the Gardens, one was presented to the Dublin Society in 1844, five were sold at prices ranging from £150 to £450, and eleven died in the Gardens. In 1836 a giraffe house was erected. In 1837 Her Majesty Queen Victoria signified her pleasure to become Patroness of the Society. An orang-outang was purchased for £100, and a cage was put up for it. On June 19, 1839, a young male giraffe was born, the first recorded instance of this species breeding in captivity, but it died nine days after. On May 27, 1841, a young male giraffe was born, the first ever reared in captivity. In 1843 a new carnivora terrace was completed. Jenny, the orang, died. In 1844 a polar-bears’ den and bath were erected. In 1846 the largest of the giraffes died, having been upwards of eleven years in confinement. In 1850 a young hippopotamus was presented to the Society by Abbas Pasha. In 1851, by bequest from the late President, the Earl of Derby, the Society acquired the herd of elands (two males and three females) which was the origin of the Society’s stock of this important animal. In 1852 His Royal Highness Prince Albert was President. The drainage of the Gardens, begun in 1851, was completed. A python house, a chimpanzee house, and an aquatic vivarium were made. A Red River hog was obtained. In 1854 the hippopotamus house, with a large bath and massive iron railings, was completed. The most important addition was the female hippopotamus, Adhela, presented by the Pasha of Egypt. The Society now possessed a pair of these huge pachyderms. These animals bred in 1872, and the female is still living (1902) in the Gardens.