Alexander the Great possessed his zoological gardens. We find from Pliny that Alexander had given orders to the keepers to send all the rare and curious animals which died in the gardens to Aristotle. Splendid must have been the zoological gardens which the Spaniards found connected with the Palace of Montezuma. The letters of Ferdinand Cortez and other writings of the time, as well as more recently "The History of the Indians," by Antonio Herrera, give most interesting and detailed accounts of the menagerie in Montezuma's park. The buildings belonging to these gardens were all gorgeous, as became the grandeur of the Indian prince; they were supported by pillars, each of which was hewn out of a single piece of some precious stone. Cool, arched galleries led into the different parts of the garden--to the marine and fresh-water basins, containing innumerable water-fowl,--to the birds of prey, falcons and eagles, which latter especially were represented in the greatest variety,--to the crocodiles, alligators, and serpents, some of them belonging to the most venomous species. The halls of a large square building contained the dens of the lions, tigers, leopards, bears, wolves, and other wild animals. Three hundred slaves were employed in the gardens tending the animals, upon which great care was bestowed, and scrupulous attention paid to their cleanliness. To this South American zoological garden of the sixteenth century no other of its time could be compared.[2] More than six centuries ago, our Plantagenet kings kept in the Tower of London exotic animals for their recreation. The Lion Tower was built here by Henry III., who commenced assembling here a menagerie with three leopards sent to him by the Emperor Frederic II., "in token of his regal shield of arms, wherein those leopards were pictured." Here, in 1255, the Sheriffs built a house "for the King's elephant," brought from France, and the first seen in England. Our early sovereigns had a mews in the Tower as well as a menagerie:-- "Merry Margaret, as Midsomer flowre, Gentyll as faucon and hawke of the Towre."--_Skelton._ In the reign of Charles I., a sort of Royal Menagerie took the place of the deer with which St. James's Park was stocked in the days of Henry VIII, and Queen Elizabeth. Charles II. greatly enlarged and improved the Park; and here he might be seen playing with his dogs and feeding his ducks. The Bird-cage Walk, on the south side of the Park, had in Charles's time the cages of an aviary disposed among the trees. Near the east end of a canal was the Decoy, where water-fowl were kept; and here was Duck Island, with its salaried Governor.