Joseph Sweetman Ames became Director of the Physical Laboratory at Johns Hopkins University in 1901. He taught until becoming provost of the University in 1926 and president from 1929 to 1935. This collection largely consists of speeches and lectures given at Johns Hopkins, but also includes correspondence, photographs, reprints, and biographical information.

Josiah Royce (November 20, 1855 – September 14, 1916) was an American objective idealist philosopher. The Royce Collection spans the years from 1878 to 1916 and includes correspondence with members of the George B. Coale family (chiefly Mr. Coale, 1878 - 1887), his unpublished Hopkins dissertation, several manuscript compositions, photographs and lecture notes by a student in one of Royce's philosophy classes at Harvard.

Nicola Sacco and Bartolomeo Vanzetti were Italian-born US anarchists who were convicted of murdering a guard and a paymaster during an armed robbery on April 15, 1920, in South Braintree, Massachusetts. The collection consists of four pamphlets published in 1927 by defense committees organized on behalf of the two accused men.

A zine is most commonly a small circulation self-published work of original or appropriated texts and images usually reproduced via photocopier. This collection of zines was assembled by curators within Special Collections and were printed between 2007 to 2013.

Joseph Trueman Thompson (1891-1977 )was a professor of civil engineering at Johns Hopkins University. The collection consists largely of Joseph Trueman Thompson's written reminiscence of his career at the Johns Hopkins University; the materials span 1912-1976.

Georgette Scott (1904-1999) was a novelist and playwright who wrote under the name Joyce MacIver; she was born and raised in Baltimore and began her writing career at the Baltimore Sun. The collection consists of writings, personal materials, printed material, and photographs dating from the 1940s to the 1990s.

Julian C. Stanley (1918-2005) as a professor of psychology at Johns Hopkins University. The collection consists of a large selection of Julian C. Stanley's published reprints, abstracts, reports, and seminar papers (1949-1968) in the field of educational psychology.

Kemp Malone was a medievalist, philologist, etymologist, authority on Chaucer, and Professor of English Literature at Johns Hopkins University for over 30 years. The papers span the period 1913-1975 and contain drafts, typescripts, proofs, research notes, notebooks, lectures, reprints and news clippings.

Kent D. Currie was a printer and typographer who lived in Baltimore, Maryland. The bulk of the collection is formed by Currie's collection of type samples. It includes brochures from Europe, in particular Holland and United States, with a significant attention to Baltimorean type designers. Noteworthy is also Currie's correspondence. The papers span the 1920s to 1950s.

Kent Roberts Greenfield (born 1893) was Professor of History at Johns Hopkins University and chief architect of the official United States Army History of World War II. The collection consists of correspondence, lecture notes, student notes, student papers, writings and research notes, printed material, and photographs and postcards. The bulk of the material covers his work as an army historian (1942-1945, 1946-1958).

Kirby Flower Smith (1862-1918) was professor of Latin at Johns Hopkins University from 1889 until his death in 1918, and published several books on the Roman elegiac poets. The collection consists of reprints, typed transcripts, and thirty notebooks of notes for lectures and articles dating from 1892-1916.

Collection consists of one bound volume that served as a register for visitors to the Ladies' State Sanitary Fair held at the Maryland Institute in Baltimore, April 1864. Notable signatures include Abraham Lincoln; Mary Todd Lincoln; Treasury Secretary, Salmon P. Chase; Secretary of State, William Henry Seward; Maryland Governor, Augustus W. Bradford; and Major General Robert C. Schenck.

Leon Carroll Marshall (1879-1966) was a professor, Institue of Law, Johns Hopkins University. Collection consists of one bound volume (the second of two) containing verbatim account of psychology seminar held at Johns Hopkins on September 1-3, 1925.

Leon Madansky (1923-2000) was a Johns Hopkins University professor of Physics. This collection consists of material dating from 1941 to 1997 and includes student notebooks, reports, correspondence, subject files, and article reprints.

Leonard Leopold Mackall, American bibliographer, editor and collector was born in Baltimore on January 29, 1879. The collection consists of correspondence, scrapbooks, subject files and other research materials. The correspondence in the collection spans the years 1547 to 1937 with the bulk of the material spanning 1900-1937. There is additional information dating from 1949 regarding the collection after it was acquired by Johns Hopkins Libraries.

Abraham Lincoln Gordon (1913–2009) was the 9th President of the Johns Hopkins University (1967–1971) and a United States Ambassador to Brazil (1961–1966). Collection consists of biographical material, speeches (1967-1971), and clippings describing Lincoln Gordon's appointment as president of The Johns Hopkins University.

Lloyd Logan was a chimst and Johns Hopkins professor born in Nova Scotia in 1890. The collection consists of material relating to Lloyd Logan's days as a student at Johns Hopkins, his service in World War I, and his research and patents spanning 1918-1939.

Louisa Hoffman, daughter of Amuel Owings Hoffman and Louisa A. Gilmore, was born in Baltimore about 1831 and died on 4 January 1884. The collection consists of a Civil War diary of Louisa Hoffman, of Baltimore, Maryland, dated 1860-1862.