Garrett later became a banker and financier at his grandfather's historic mercantile firm, Robert Garrett and Sons, at their landmark office building on the southwest corner of South and Water Streets in
downtown Baltimore. He was an investor in the
B&O Railroad.
Archeology and manuscripts Garrett had an early intensive interest in science, especially in
history and
archeology, and became an early collector and important donor. He helped to organize and finance an archaeological expedition to
Syria, led by Dr.
John M. T. Finney. From 1932 to 1939, he was involved with the Committee for the Excavation of
Antioch and Its Vicinity both helping to fund the excavations and working on them. Garrett's hobby was collecting medieval and Renaissance
manuscripts. Garrett amassed a collection of historical volumes of Western and non-Western manuscripts, fragments, and scrolls, originating from Europe, the Near East, Africa, Asia and Mesoamerica, ca. 1340 B.C. – A.D. 1900s. He inherited his collecting interest from his father, Thomas Harrison Garrett. After his father's sudden death in 1888, Robert spent the following two and a half years traveling extensively with his mother and two brothers, Horatio and John, in Europe and the Near East. During his travels Garrett developed a particular interest in manuscripts and began collecting. He used the text
Universal Paleography: or, Facsimiles of Writing of All Nations and Periods by J. B. Silvester (by Sir Frederic Madden, London, 1949–50) as his guide for collecting primary examples of every known type of script. Garrett was for many years an enthusiastic alumnus and served as trustee of Princeton University and also on the governing board of the
Baltimore Museum of Art, founded in 1914 by his aunt
Mary Elizabeth Garrett, (1857-1915), and working in the relocation and construction project of their new museum building designed by famous American architect
John Russell Pope (1874-1937), on Art Museum Drive, off of
North Charles Street, and adjacent to the also newly located
Homewood Campus of
Johns Hopkins University. In 1942, Garrett donated his collection of more than 11,000 manuscripts to
Princeton University, including the "Aksum Scrolls" and sixteen
Byzantine Greek manuscripts, containing rare examples of illuminated
Byzantine art.
Baltimore activist Through a mayoral appointment, Garrett served as the chairman of the city's Public Improvement Commission. He was also largely responsible for bringing the new
Boy Scouts of America youth organization to Baltimore in 1910, shortly after its national establishment and imported from
Great Britain with founder. He managed the BSA in Baltimore until his retirement in 1934. In 1919, Garrett gave to the City of Baltimore a tract of land of a city block along East Patapsco Avenue, between Second and Third Streets in its recently annexed
Brooklyn neighborhood in South Baltimore to be used as a public park, which was named in his honor. Garrett helped develop Baltimore's public recreational facilities, many of which were privately funded by himself, colleagues and friends. Garrett organized the Public Athletic League which later merged with a similar earlier Children's Playground Association. He was the first chairman of Baltimore City's Bureau of Recreation, and the first chairman of the city's Board of Park Commissioners for the combined Department of Recreation and Parks. Garrett was through much of his life an active member of the National Recreation Association, and was elected its chairman in 1941. In the Baltimore mayoral campaign of 1947, both the Republican and Democratic nominees promised that, if elected, they would name Garrett as chairman of the city's Department of Recreation and Parks. A devout Presbyterian throughout his life, he was a member of their national convention - the General Assembly of the
Presbyterian Church in the United States, and was recognized in 1948 as the year's outstanding layperson in the field of religious education by the
International Council of Religious Education. In the realm of civil rights for African-Americans, Garrett was a staunch conservative and opposed any
racial integration of the city's public facilities in its parks, playgrounds, swimming pools, tennis courts and recreation centers. Controversies increased as the national
civil rights movement expanded in the late 1940s and 1950s. Garrett was later asked to resign from the Board of Park Commissioners when a positive vote for integration was taken. ==Death and legacy==