In the 1860 US Census for Baltimore Ward 11, Baltimore (Independent City), Maryland the family of Allen S. Barnum was enumerated as follows:
Dwelling #1196; Family #1324
Allen S. Barnum, 43, M, Clerk, Real property $2,500, b. Pennsylvania
Mary B. Barnum, 62, F, b. Pennsylvania
Carrie M. Barnum, 20 F, b. Maryland
Mary L. Barnum, 18, F, b. Maryland, Attended school within the year
Fanny R. Barnum, 13, F, b. Ohio, Attended school within the year
Henry H. Barnum, 11, M b. Ohio, Attended school within the year
Edward T. Barnum, 9, M, b. New York, Attended school within the year
Alice S. Barnum, 6, F, b. Maryland
Peter Y. Hepburn, 69, M, b. Connecticut
Susan Jacobs, 38, F, Black, Servant, b. Virginia, Person over 20 years of age who cannot read & write
From the New York Times, March 25, 1878: Two Brothers Die on the Same Day. The Baltimore Sun of the 19th inst. says: "Theron Barnum and Allen S. Barnum, brothers, who were largely identified with the hotel business in different parts of the country, died Sunday last, the former at the hotel in Saint Louis which be founded, and the other at the residence of his son-in-law, Mr. George Warner, Baltimore. Mr. Theron Barnum died in the morning, aged 75 years, the
oldest hotel proprietor in the West. Mr. Allen S. Barnum died at 11 o'clock Sunday night, of heart affection, after only a few minutes' illness. They were sons of Elijah Barnum, of Pennsylvania, who was a brother of David Barnum, the founder, 51 years ago, of Barnum's Hotel, Baltimore. Theron, the eldest of the brothers, commenced his hotel career as an employee of his uncle David, in Baltimore, about 46 years ago. He afterward was proprietor of a hotel at Ellicott's Mills, Howard County, and than at Franklin, Baltimore County. In 1842, he removed to Terre Haute, Ind., where he kept the chief hotel. From there he removed to Saint Louis and opened the house on Fourth street which still bears the name of Barnum's Hotel. He conducted the business until after the war, when he associated with him Mr. Pratt, the present proprietor. Mr. Barnum retired a short time before his death, but continued to live at the hotel. His two sons, one of whom survives, opened Barnum's Hotel, New York, six years ago and associated with them in that enterprise Mr. Allen S. Barnum. The hotel is not now known by that name. Allen S. Barnum also commenced his hotel career at Barnum's, in Baltimore, when it was under the control of Messrs. Andrew McLaughlin and Zenus Barnum, his cousin, about 1842. He subsequently was proprietor of a hotel at Cumberland, Md., then at Cleveland, Ohio, and in 1852 took the Howard House, New York, and was also engaged in other hotel enterprises. He a second time was connected with Barnum's, in Baltimore, and is well remembered by the guests at that house for his affability and social qualities. During the last two years he was not engaged in active business. Theron Barnum leaves a widow and one son. A widow, three daughters, and two sons survive Allen S. Barnum. The sons are in mercantile business in Baltimore."