The Thomas H. Osbourn Family papers consist mainly of tax documents for the Prince George's County, Maryland, properties held by various members of the family in the nineteenth and twentieth centuries. The correspondence includes a letter of recommendation from Benjamin Hallowell, who was president of the Maryland Agricultural College in 1859.
The Osburn family papers consist of letters primarily written to Ginnie Osburn by her brothers Lewis and James who served in Maryland regiments of the Union Army during the Civil War. Major topics within the correspondence include life as a soldier, family concerns, illness, financial worries, travel on the frontier, business prospects, and local news.