The collection is arranged in the following series:

Series I. Correspondence, 1883-1950. This series is comprised primarily of correspondence addressed to either Cassell or other family members. The series has been divided into the following subseries:

Subseries A. Charles Willis Cassell Correspondence, 1883-1934. This subseries includes Cassell's personal, professional and business correspondence. The personal correspondence (1883-1935), divided by subject matter and then organized chronologically, includes letters of sympathy following the death of various family members and letters relating to his marriage with Helen Buchanan.

Cassell's professional correspondence (1896-1927) relates to his work as home missionary pastor of the Lutheran Church. It includes letters regarding calls largely requiring Cassell's services as pastor in various Lutheran churches; letters concerning synodical matters such as the printing of the "The Monitor"(published by the Southwestern Virginia Synod), and letters and reports regarding a closer union between the Virginia and North Carolina Lutheran synods. Also included are letters concerning Cassell's role as financial secretary of Marion College.

The personal business affairs correspondence (1903-1934) is comprised of letters concerning Cassell's house in Marion, Virginia; letters from S.W. Hedrick (a farm manager in Rural Retreat, Virginia) relating to farm affairs; and letters concerning Cassell's property in Columbia, South Carolina. Many of these letters mention the economic difficulties Cassell had regarding this property as a result of World War I. The business affairs correspondence includes a few pieces of outgoing correspondence.

Subseries B. Family correspondence, 1897-1950. This subseries contains letters addressed to Cassell's wife, Helen Buchanan Cassell, and children--Mary, Rebekah, and Joe (Joseph?). Helen Cassell's letters include personal correspondence from family and friends both before and after her marriage. Mary Cassell's correspondence consists of letters from family and from Irvine MacNeill, a U. S. soldier during World War II. MacNeill's letters relate his experiences and feelings while training at Camp Lee and Camp Crowder, and later while serving at Drew Field (Florida) and Camp Gordon (Georgia). The subseries also includes the correspondence of Rebekah Cassell (largely from family and friends) and Joe (Joseph?) Cassell, as well as a set of invitations to various commencements, weddings and entertainments. Arranged by name of recipient, then chronologically, with invitations completing the subseries.

Subseries C. Other Correspondence, 1870-1947. This subseries includes correspondence sent to Miss Bertha Buchanan, Mrs. Mary Buchanan, Miss Mary Lookup, and Mr. and Mrs. Preston. Also included are letters to unidentified people. Arranged chronologically.

Series II. Financial Records, 1890-1935. This series has been divided among the following subseries:

Subseries A. Account books, 1899-1935. The account books mostly relate to Cassell's farm but also include bank, personal, trip and store account books. The books are all signed by C.W. Cassell, except one trip account book that apparently belonged to Mary Brown Cassell. The six farm account books contain detailed information regarding the sale of farm produce, statements on farm workers' hours and wages, conditions of crops, stock gains and losses and other farm income and expenditures. One book devoted to cattle sales also lists promissory notes and contributions made to schools, churches, libraries, etc. A personal account book, with notations regarding daily expenditures for groceries, gas, laundry, etc., is included as well.

Subseries B. Bank Account Records, 1899-1927. This subseries includes bank statements, checks, check stubs, and deposit slips from accounts held by Cassell at financial institutions in Graham, Rural Retreat, Stephen City, Roanoke, Marion, Buena Vista, Luray and Mt. Sidney, Virginia and Bluefield, West Virginia. The subseries is arranged by document type, then by name of institution, then chronologically.

Subseries C. Insurance Assessment Notifications, 1900-1913. These notifications were sent to Cassell from the Farmer's Mutual Fire Association of Wythe County, Virginia. The material is arranged chronologically.

Subseries D. Promissory notes, 1899-1926. This subseries includes promissory notes from Cassell to either individuals (e.g. Sidney Cassell) or institutions (e.g. Marion College). The notes are arranged chronologically.

Subseries E. Tax Records, 1915-1928. This subseries is largely comprised of taxes charged on the Cassells. The material is arranged chronologically.

Subseries F. Receipts, 1892-1925. This subseries includes receipts from different stores and the Norfolk & Western Railway Company. It also contains receipts indicating Cassell's payment on interest on mortgages for property in Columbia, South Carolina, and materials purchased to build a house there. Also included are receipts from various hospitals, the Theological Seminary of the Evangelical Lutheran Church at Philadelphia, Roanoke College, Presbyterian Minister Funds, etc. The subseries is organized by receipt type, then chronologically.

Subseries G. Farm Reports, 1924-1928. This subseries contains general statements of the farm work, time put in by regular help, special help employed, conditions of crops, increase or loss of stock, sale of stock, sale of grain not in exchange of work, sale of grain for work, sale of poultry and eggs, other sales, income and expenditures. The reports were sent to Cassell by S.W. Hedrick, the farm manager. The subseries is organized chronologically.

Subseries H. Miscellaneous financial records, 1901-1926. This subseries includes personal notations regarding Cassell's farm, a list of members of the Evangelical Lutheran Church that paid to support Cassell as pastor for the Bland Charge, the estate of V. J. Hudson, etc. This subseries is organized chronologically.

Series III. Legal Records, 1922-1927. This series is largely comprised of legal documents regarding Cassell's business affairs in Columbia, South Carolina. Among the papers are a charter for Caldwell T Co., court resolutions regarding a legal dispute on the construction of the Cassells' house there; a contract of sale between The Monticello Home Co. and Mrs. Helen R. Cassell, etc. The series is arranged chronologically.

Series IV. Personal Records, 1888-1934. This series is divided into the following subseries:

Subseries A. Diaries, 1893-1927. Cassell's diaries--ten in number--contain detailed records of his daily activities as a pastor of the Lutheran Church, personal reflections, letters received, and commentaries on weather, personal and family events. Arranged chronologically.

Subseries B. Notebooks, 1894-1895. Contains one notebook holding Cassell's notes on catechesis under Dr. Spaeth at the Lutheran Theological Seminary (Philadelphia).

Subseries C. Scrapbooks, 1897-1928. The scrapbooks include newspaper clippings concerning Cassell's services as Lutheran pastor, historical sketches of various Lutheran churches, obituaries and social events related to Cassell's family. (Note: newspaper clippings are pasted in ledger books also containing account notations from an unidentified church (1850-1852) and court judgments (1854-1856).

Subseries D. Miscellaneous personal records. This subseries includes Cassell's notes concerning the history of various Lutheran churches and pastors, newspaper clippings related to Lutheran churches, and other general materials.

Series V. Printed Materials, 1888-1934. The printed materials series includes a 1921 issue of "The Marion College Record," two booklets, pamphlets, programs, postcards, newspaper clippings and other ephemeral material.