The 17 December 1878 statement of Thomas Tredway indicated that Jemima DeMoss and Elisha Meads were married in Harford County, Maryland, “at her fathers [John DeMoss, Jr.] house in Harford County” on 9 November 1817.
I do not think that’s strong enough evidence to conclude that Jemima’s mother was deceased on the date of Jemima’s marriage. Use of the word “father’s” to describe the real property of a person’s parents in the 19th century was not uncommon. Her father could actually have been deceased at the time of the marriage as well–even though the word “late” or “deceased” was not used in the reference–and her mother could have been living.
I already knew that John DeMoss, Jr. lived in Harford County, Maryland, but the statement would have been helpful had that not been known. I knew that John owned real estate, but the reference to his “farm” would have suggested real estate ownership instead of him being a tenant farmer.