The Marjorie Mason papers date from the 1960s to 1995 and measure seven linear inches. The papers are arranged in the following series: BIographical information, Family Essays, Newspaper Columns, Poems, Short Stories, and Books.

The Biographical information series includes two photographs of Marjorie Mason and a 1995 interview with Mason conducted by Helen Gunderson in which Mason discusses her childhood as a minister's daughter, her faith, and her writing.

The Family Essays series consists of twelve essays written about various members of Mason's family, including her mother, father, aunt, sisters, and ancestors. Included is a memoir written by her sister Charlotte Walker Baker and a newspaper clipping of her brother Harvey Walker. The essays include the history of her family, and the impact of the Great Depression and World War Two on her family's life and work.

The Newspaper Columns (1981-86) consist of Mason's weekly columns in the Zapata County News, in Zapata, Texas. Her column, "Etcetera," contained an eclectic mix of humor, advice, life stories, and discussion of various issues.

The Poems series consists of poems and limericks written by Mason about a wide variety of topics, including Texas, family, music, nature, and religion.

The Short Stories include short fiction and children's stories, mostly written while Mason was attending graduate school. Two books complete the collection: Easy Lessons in English, a workbook written by Marjorie Mason to aid in the teaching of basic English grammar, and The Brewer of Old What and Other Poems, a book of poetry, letters, and other writings by Mason's grandmother Emma Bassett Hennessey edited by Marjorie Mason.