The three-manual pipe organ is a gift of Mr. and Mrs. Norman B. Black of Fargo. A stained glass window, designed by Homer L. Huntoon and presented by him in 1932 in memory of his wife and infant son, contains three panels, the central one of which depicts the sacrifice of motherhood, showing a young mother with her baby kneeling before an angel who holds the chalice and host, symbols of redemption. Art and music are represented in the two side panels. 6. UNITED STATES POST OFFICE AND COURTHOUSE, 705 1st Ave. N., erected in 1929-30 at a cost of $600,000, is in Italian Renaissance style, built of reinforced concrete faced with limestone. Ninety tons of steel were used in the first floor, making it strong enough to support 10 stories in addition to its present three. 7. FARGO'S FIRST HOUSE (_private_), 119 4th St. S., is the home of Mr. and Mrs. Henry Hector. It was built in 1871 of oak logs cut in what is now Island Park, and, although used for two years as a hotel, it was originally intended as the home of A. H. Moore, United States marshall. 8. CASS COUNTY'S FIRST COURTHOUSE, 708 1st Ave. S., has been remodeled into the DeVolne Flats. This two-story gray frame building has had a varied existence. Built in 1874, it served for 11 years as the seat of the county government. It was then moved to the corner of Seventh and Front Streets and used for a Government land office until October 4, 1886, when the construction of a new Northern Pacific depot made it necessary that the building be again moved, this time to Eighth Street. It remained there for a few months, then was sold for $500 and moved to its present location where it became the first club rooms for the Fargo Y. M. C. A. 9. MASONIC GRAND LODGE MUSEUM (_open weekdays 9-5_), 501 1st Ave. N., houses the Masonic Library, the only lodge library in the State. The museum includes exhibits ranging from Indian artifacts and historical relics to religious articles. Fargo's first sewing machine was donated to the lodge because its owner found it so "noisy to run." The library specializes in genealogical research for Masonic families. Originally it was part of the museum and contained only copies of rare books. The lodge members became interested in a State-wide program of adult education, and began a lending library of non-fiction books. A collection of 800 rare volumes, a gift to the library of T. S. Parvin, secretary of the Iowa grand lodge, was destroyed in the Fargo fire; the library later bought Mr. Parvin's entire private collection. Important items include _Orationes Philelphi_ printed in 1491; a collection of Bibles dating from the time of King Christian III of Denmark (1503-1559); a copy of the first printed constitution of Freemasonry, dated 1723; and histories of some of the early guides.