Below the feet of Andromeda, in the northeast, appears Perseus, her rescuer, hurrying to the combat with the oncoming Sea Monster, and carrying the blood-freezing head of Medusa in one hand and his diamond-hilted sword in the other. He wraps the glory of the Milky Way around him like a flying mantle, and brandished in the direction of Cassiopeia, the maiden’s mother, and of King Cepheus, her father, is seen his magic blade, made splendid in the sky by one of the finest assemblages of small stars that can anywhere be seen. This beautiful star-swarm, visible to the naked eye as a glowing patch in the Milky Way, is indicated in Chart X by a double cluster of dots above the star Eta (η). Seen with a powerful opera-glass, or better with a small telescope, it is an object that one can never cease to admire and wonder at. It is so bright that the unassisted eye sees it as soon as it is directed toward that part of the sky. It seems to throw a halo over the surrounding sky, as if at that point the galaxy had been tied into a gleaming knot. It is popularly called the “Sword Hand of Perseus.” But how inadequate seems such terrestrial imagery when we reflect that here a vast chaotic nebula has been, through æons of evolution, transformed into a kingdom of starry beauty. The star Alpha (α) Persei, also known as Algenib (Arabic _Al Janib_, the “Side”), is the centre of a bending row following the curve of the Milky Way. The appearance of this curve of stars is very attractive to the eye. Algenib is a beautiful star, allied to our sun in spectroscopic character, and approaching us at the rate of about 560,000 miles per day.