Some of Fitz’s instruments had individual histories and were associated with important events in astronomy. One was taken in 1849 on the Chilean astronomical expedition of Lieut. James M. Gilliss. Another was used by L. M. Rutherfurd in his epochal astronomical photography at Columbia University. One, made for the Allegheny Observatory, is still in use at that institution. It appears from his account book that Fitz made many telescopes, and some have turned up in strange places. The lens of one of his refractors was located a few years ago in South Carolina, in use as substitute for the lens in an automobile headlamp![8] At an eastern university in 1958 the writer saw another of his refractors incorporated into apparatus used in graduate student experimentation. Among the others who began telescope-making about 1845 was the portrait painter who was to become one of the world’s foremost telescope-makers, Alvan Clark. Clark is supposed to have become first interested in lens and mirror making about 1844, and, as a resident of Cambridge, Mass., to have been inspired three years later by the great 15-inch refractor installed at Harvard. His first encouragement came from the British astronomer W. R. Dawes, with whom he had a correspondence on their respective observations and to whom he sold a 7½ inch refractor in 1851. The following year he established, with his sons, the firm of Alvan Clark and Sons, a name which was later to become one of the most famous in the field of telescope making. Whereas Holcomb had demonstrated that telescopes could be made in this country, and Fitz that American instruments were adequate to the needs of the professional astronomer, Clark was to prove that American instruments could compete commercially with the finest made in Europe. In 1862 Alvan Clark and Sons completed an 18½-inch refractor which was long to serve the Dearborn Observatory. It is now in the Adler Planetarium. The famous Lick Observatory 36-inch refractor was completed in 1887, the year of Clark’s death, and his sons went on to build the 40-inch Yerkes refractor, (1897) still the largest refractor ever built. It is no reflection on Clark to note that he was more fortunate than Fitz, in his longer life, his association with Warner and Swasey in the construction of mountings, and in the continuity given to his work by his sons.