Benjamin Silliman and Benjamin Silliman, Jr. were both 19th century American chemists and original members of the National Academy of Sciences. The collection spans the years 1816-1871 and consists of 28 autograph letters from both Benjamin Silliman and Benjamin Silliman, Jr., and one eulogy of Benjamin Silliman.

Edward McDonald Greenway, Jr. was born in New York in 1820. The collection spans the years 1737 to 1876 and consists of approximately 250 items of correspondence and some legal documents. The correspondents are primarily prominent lawyers, politicians, statesmen, and figures of the Revolutionary War from Maryland.

The Garrett autograph collection contains signed letters and documents that record U.S. history and culture, including presidents, statesmen, and military figures.

This collections consists of one leather bound volume that contains nine notes and autographs; six in German, three in English. The entries range in date from 1862-1863 to 1880.

Harriet L. Lagowitz was a resident of New York city in the late nineteenth century. The collection (1877-1890) is formed by two autograph albums and approximately 80 envelopes containing the autographs of theater and stage performers.

Johns Hopkins (1795-1873) was a highly successful Baltimore merchant and philanthropist. He left much of his wealth to found a university and hospital in Baltimore. This collection contains manuscripts, photographs and printed material by or about Johns Hopkins and his ancestors, 1743-2005.

James Roberts Gilmore (1822-1903) was an American author who often used the pseudonym "Edmund Kirke." This collection includes letters collected by Gilmore from literary, political, and popular individuals of the 19th century. The letters span the years 1820 to 1903.

Jacobus Henricus (Henry) van 't Hoff (1852-1911) was a chemist credited with founding the science of stereochemistry, and in 1901 he was awarded the first Nobel Prize in chemistry. The majority of the papers are those reflecting family affairs or honors accorded van 't Hoff for his work. This collection does not contain his scientific or working papers except for notes of two lectures and copies of his published papers. The papers are mostly in Dutch. The papers span from 1837 to 1924.

Richard Harding Davis was an American journalist, war correspondent, and novelist. The collection consists of autograph letters and manuscript fragments of well-known literary figures of the late 19th and early 20th centuries. Most of the items were exhibited at the World's Fair in 1893.

Sarah L. Hawkes (1844-1899) was the daughter of Winslow and Lydia McLellan Hawkes and the grand-daughter of General James McLellan (1777-1854), a prominent Bath, Maine merchant and shipbuilder. The collection consists of a Civil War period autograph album with autographs that span 1860 to 1877.

The collection consists of holographic letters and documents of signers of the Declaration of Independence. Many of the letters describe the proceedings in Congress and some contain information relaitng to the progress of the Revolutionary War. One signer, Lewis Morris (1726-1798), is not included in the collection.

The papers in the Slack Family Collection have been artificially arranged and consist largely of correspondence collected by Susan Brune Randall and her daughter, Elizabeth Randall, to form an autograph collection spanning 1853-1928. The collection does not include any significant information regarding family or business interests.

A collection of letters from contemporary literary figures and publishers.