The Herschel Daniel "Dan" Carpenter Papers document Carpenter's life and career from his boyhood and education in rural Ohio, to his leadership role in the New York City settlement house movement. The collection also documents Hudson Guild, a West Side settlement house from its origins in the 1890s, when it organized clubs for Chelsea boys, to its work a century later, when it provided a wide range of social services to West Side residents.

The records include addresses, annual reports, correspondence, memos, minutes, program files, newsclippings, administrative records, photographs, video tape, and film. They include material dating from the decades prior to the establishment of the settlement which shed light on the philosophy and motivation of its founders, and offer a unique view of the first wave of the settlement house movement in America. The records document social conditions, demographic change, political activity and philanthropy in New York City. Addresses by East Side House founder Everett P. Wheeler, included in Series I, document his family history and career as a lawyer and civic reformer prior to the founding of East Side House. Wheeler's correspondence details his role in establishing the settlement and managing it during its first decades.

George Hamlin (1868-1923) was an American tenor. His daughter, Anna (1900-1988), was a soprano and voice instructor. The George and Anna Hamlin papers, dating from 1868 to 1983, document the careers of both vocalists through clippings, diaries, autograph books, programs, publicity materials, scores, photographs, and correspondence.

The records include annual reports, board minutes, budgets, by-laws, correspondence, memos, publications, reports, scrapbooks, photographs and printed material. They document the settlement and its antecedent institutions from 1854 to 1994, offering a unique view of the first wave of the settlement house movement in America, as well as related philanthropy and social welfare activities in New York City over a 140 year period. The origins of Goddard-Riverside Community Center are documented in Series I, which includes eight institutional subseries. These records provide a wealth of information on philanthropic, social welfare and settlement work from the mid-19th century through the 1950s. Series II - IV document the activities of the settlement from 1959 to the 1990s, with a particular emphasis on the urban renewal period of the 1960s. Items in Series VII include photographs of staff, activities, facilities of Goddard-Riverside Community Center, as well as several of its predecessor institutions.

The Grosvenor Neighborhood House Records document the settlement from its incorporation in 1916 when it sponsored day care and hot lunch programs for East Side children, to its activities over seventy-five years later when it provided social services to youth and families on the Upper West Side.

The Hudson Guild Records document the institution from its origins in the 1890s, when it organized clubs for Chelsea boys, to its work a century later, when it provided a wide range of social services to West Side residents.

Correspondence, manuscripts, documents, notes, printed material, and photographs of Leonard Altman concerning his work as editor of LISTEN and board member of Carnegie Hall as well as his other professional and personal interests.

The Maryland Citizens Against State Executions (Maryland or MD CASE) Records contain documents from over 25 groups and 1,300 individuals that united to help successfully end the death penalty in Maryland in 2013 through education, grassroots action, and public demonstration. The collection consists of correspondence, meeting minutes, legislation, lobbying materials, subject files, special event and conference materials, case files and clippings.

The Murder Victims' Families for Reconciliation Records document the organization's efforts to abolish the death penalty in all cases. The organization includes family members of both homicide victims and those executed as well as their respective supporter. Included in the collection are handwritten notes, newspaper clippings, pamphlets, brochures, booklets, programs, information packets, photographs, flyers, proofs, drafts, manuscripts, correspondence, memos, transcripts, mailing lists, schedules, meeting agenda, meeting minutes, meeting summaries, by-laws, manuals, checklists, worksheets, evaluation forms, resumes, applications, forms, financial summaries, budgets, contracts, court proceedings, legislative bills, amici curiae, memorabilia, audio/video materials.

New York City Opera (NYCO) was famously dubbed "The People's Opera" by Mayor Fiorello LaGuardia at its founding in 1943. The Opera company's mission is to inspire audiences with innovative and theatrically compelling opera at an affordable price. This collection documents the artistic productions and the daily administrative functions and operations attest to the mission of the company. The materials in this collection consist of administrative and financial records, production files, stage guides, scores, correspondence, programs, photographs, posters, scenery plans, memorabilia, printed materials, and audio and video recordings, dating from 1924 to 2019, with its bulk dating from 1965 to 1991.