In 1774, the music teacher made for himself a five-and-one-half-foot Gregorian telescope; and a year later, a Newtonian, with a four-and-a-half-inch aperture, which magnified two hundred and twenty-two times. The making of these instruments showed great mechanical skill and accurate knowledge. He began now to study the heavens in earnest, but the teaching must go on to provide daily bread. He directed an orchestra of nearly one hundred pieces, and Caroline copied the scores and vocal parts. So absorbed was he in his astronomical work, however, that at the theatre, between the acts, he would run from the harpsichord to look at the stars. This boyish eagerness and naturalness he kept through life. He soon made a seven-foot reflector, then a ten-foot reflector. The mirrors for these telescopes were all made by hand, machines for the purpose not being invented till ten or more years later. Alexander, with his mechanical skill, assisted, and Caroline was always busy at the work. She says, "My time was taken up with copying music and practising, besides attendance on my brother when polishing; since, by way of keeping him alive, I was constantly obliged to feed him, by putting his victuals by bits into his mouth. This was once the case, when, in order to finish a seven-foot mirror, he had not taken his hands from it for sixteen hours together. In general he was never unemployed at meals, but was always at those times contriving or making drawings of whatever came in his mind. Generally I was obliged to read to him while he was at the turning-lathe, or polishing mirrors, 'Don Quixote,' 'Arabian Nights' Entertainment,' the novels of Sterne, Fielding, etc.; serving tea and supper without interrupting the work with which he was engaged."... So busy that he could not find time to eat or sleep! Rare devotion of a rare mind! He now began to study every star of the first, second, third, and fourth magnitudes in the sky. He carefully observed the moon, and measured the height of about one hundred of her mountains. Her extinct volcanoes, and her unpeopled solitudes, without clouds or air, were an impressive study. He was now forty years old,--not young to begin the study of a new and illimitable science, but not too old, for one is never too old to begin a great or a noble work. Through Dr. William Watson, Fellow of the Royal Society, who happened--if anything ever _happens_ in this world--to see Herschel at his telescope, he became a member of the Philosophical Society of Bath, and soon in 1780 sent two papers to the Royal Society, the one on the periodical star in _Collo Ceti_, and the other on the mountains of the moon, which were read by Dr. William Watson, Jr.