The beaver, depicted on this stamp, rejoices in the scientific name of _Castor fiber_. It is a rodent of social habits and was at one time widely distributed over Europe and North America. It is now practically extinct except in Canada and even there it is said to be in great danger of extermination. Full-grown animals vary in length from thirty to thirty-six inches. They are covered with short, thick fur, which is of considerable value and their structural peculiarities are well worth noting. The beaver is furnished with powerful incisor teeth, with which it is able to bite through fairly large trees, and its fore paws are very strong. Its hind feet are webbed, so that it is a powerful swimmer, and its tail is flattened, and serves as an excellent rudder. Its ears are small and when laid back prevent any water entering them. Beavers generally live in colonies, and show remarkable intelligence and ingenuity in the construction of their homes or "lodges" and in the building of dams, where water in the vicinity of their dwellings has become too shallow to suit their tastes. These dwellings are often constructed on the banks of rivers, but the Canadian beaver is particularly fond of building lodges in the centre of large expanses of fairly shallow water. These are made of turf, tree-trunks, and other materials, and are often used as store houses for food reserves, as well as for living in. The 6d stamp follows the usual upright rectangular form and its central design consists of the portrait of Prince Albert, the Royal Consort. The portrait is enclosed within an upright oval inscribed in a similar manner to the 3d but with, of course, "SIXPENCE" on its lower portion. The numeral "6" is shown in each of the four angles. Albert Francis Charles Augustus Emanuel the younger of the two sons of Ernest, Duke of Saxe-Coburg-Gotha, was born in 1819. He was carefully educated at Brussels and Bonn (1836-8), where he showed himself an ardent student, acquired many accomplishments, and developed a taste for music and the fine arts. King Leopold and Baron Stockmar had long contemplated an alliance between Prince Albert and Princess Victoria, and the pair were brought together in 1836. When the succession of Victoria was assured the betrothal took place, and on February 19th, 1840, the marriage, which was one of real affection on both sides, was solemnized in the Chapel Royal, St. James Palace. The Prince Consort's position as the husband of a constitutional sovereign was difficult, and in the early years of his married life his interference in matters of state was resented. Ultimately he became "a sort of minister, without portfolio, of art and education", and in this capacity won much esteem and popularity. He also interested himself in agriculture and in social and industrial reform. To him was due the Great Exhibition of 1851, which resulted in a balance of a million dollars available for the encouragement of science and art.