[Illustration: Figure 27.--Brass surveying compass with outkeeper made by Goldsmith Chandlee (c. 1746-1821) of Winchester, Virginia, for Robert Lyle. Over-all length, 14-1/2 in.; diameter, 7 in. Instrument, in original wooden case, bears ink signature of Robert Lyle. In collection of the writer.] One of the most important craftsmen of Maryland was Frederick A. Heisely (1759-1839). A native of Lancaster, Pennsylvania, he served an apprenticeship there with John Hoff, the master clockmaker, from 1777 to 1783. Heisely served in the Revolution. In 1783, presumably upon the completion of his apprenticeship, he married Catherine Hoff, the clockmaker's daughter. He moved to Frederick, Maryland, where he established his own clockmaking shop and where he specialized in making mathematical instruments. A tower clock made in Frederick is in the collection of the U.S. National Museum. Heisely returned to Lancaster to become Hoff's partner, and worked with him until 1802. He then moved his shop to Harrisburg and worked there until 1820. He moved once more, this time to Pittsburgh where he advertised himself as a "Clock, Watch and Instrument Maker," with a shop at No. 6 St. Clair Street. [Illustration: Figure 28.--Brass surveying compass made by Goldsmith Chandlee for Laurence Augustine Washington in about 1795. In the library at Mount Vernon. Photo courtesy the Mount Vernon Ladies Association of the Union.] George Heisely (1789-1880), Frederick's son, who was born at Frederick, Maryland, achieved note in his own right as a maker of clocks and instruments. He worked at Second and Walnut Streets in Harrisburg. He is credited with being the person who selected the melody of "To Anacreon in Heaven" for "The Star-Spangled Banner," while he was serving as a member of the Pennsylvania State Militia.[60] _Pennsylvania_ A number of instrument makers worked in Philadelphia, which was one of the important shipping centers during the 18th century and consequently one of the important markets for nautical instruments. Probably the earliest Philadelphia instrument maker of record was Thomas Godfrey (1704-1749) who was born in Bristol Township. After serving an apprenticeship, Godfrey developed his own business as a glazier and plumber. He is stated to have done the major part of the glazing of the State House in 1732, as well as similar work on Christ Church. He also worked for Andrew Hamilton and for James Logan. Godfrey had a natural inclination and interest in science and mathematics, which may have been further encouraged by his friendship with Benjamin Franklin, who resided in the same house. Godfrey was also a fellow member of Franklin's Junto.