The sister and the brother kept close to their own rooms. Caroline was the housekeeper, and took a pride in being able to dispense with all outside help. She was small in figure, petite, face plain but full of animation. All of her spare time she devoted to her music. After the concerts she and her brother would leave the theater, change their clothes and then walk off into the country, getting back as late as one or two o'clock in the morning. On these midnight walks they used to study the stars and talk of the wonderful work of Kepler and Copernicus. There were various requests that Caroline should go to London and sing, but she steadfastly refused to appear on a stage except where her brother led the orchestra. About this time Caroline wrote a letter home, which missive, by the way, is still in existence, in which she says: "William goes to bed early when there are no concerts or rehearsals. He has a bowl of milk on the stand beside him, and he reads Smith's 'Harmonics' and Ferguson's 'Astronomy.' I sit sewing in the next room, and occasionally he will call to me to listen while he reads some passage that most pleases him. So he goes to sleep buried beneath his favorite authors, and his first thought in the morning is how to obtain instruments so we can study the harmonics of the sky." And a way was to open: they were to make their own telescopes--what larks! Brother and sister set to work studying the laws of optics. In a secondhand store they found a small Gregorian reflector which had an aperture of about two inches. This gave them a little peep into the heavens, but was really only a tantalization. They set to work making a telescope-tube out of pasteboard. It was about eighteen feet long, and the "board" was made in the genuine pasteboard way--by pasting sheet after sheet of paper together until the substance was as thick and solid as a board. So this brother and sister worked at all odd hours pasting sheet after sheet of paper--old letters, old books--with occasional strips of cloth to give extra strength. Lenses were bought in London, and at last our precious musical pair, with astronomy for their fad, had the satisfaction of getting a view of Saturn that showed the rings.