The papers of Micajah Merryman, Sr. span the years 1767 to 1788. They include a bill to John Hall from Sarah Harryman (Micajah's mother) for some household items and some livestock, followed by nine letters from the same John concerning the buying of land and settling in North Carolina's Sullivan County. The letters detail prices of land, staples, matters of planting and harvesting, trouble with the Tories, the advantages and disadvantages of Cumberland, Kentucky and the new land in Georgia. Also included is a copy of John Hall's will (1778) which Micajah witnessed. Among his military papers are a copy of his commission to "First Major of the Gun Powder Upper Battalion of Militia in Baltimore County" October 12, 1776, followed by ten documents of military orders 1778 to 1782 signed by Edward Cockey, carrying orders from General Andrew Buchanan. His land papers include deeds and surveys for property on the Gunpowder River called "Cumberland" (originally owned by George Harryman), "Blethana Cambria" and "Lost Hopes." Micajah also owned a piece of property on the Gunpowder near the "Valley of Jehosephat." There was some question over the title which ended in an opinion (April 6, 1829) from the Court of Appeals written (ADS) by Roger Brooke Taney. The principals in the dispute were the estate of Charles Ridgely (d. approximately 1800), William Welch (d. 1802), and the family of William Wann (d. approximately 1829). The series includes wills, land deeds, a land survey, and Judge Taney's opinion.

Reuben, Harry and Henry, three men enslaved by Micajah Merryman Sr., escaped and sought freedom, and there is an unsigned, undated power of attorney authorizing Micajah, Jr. to kidnap and return the men to enslavement. Mary Ensor, Micajah's wife, attempted in 1788 to make a will, and there is a legal opinion (1788) written by William Moore stating why she could not dispose of her property "duringyes the life of herself and husband." There is also a copy of the will (1801) of Elinor Ensor (d. 1805), Mary's mother.