1860 U.S. Census, Baltimore City, Maryland
Dwelling 379, Household 572
Kopp, Michel [sic], 44, male, day laborer, $0 real estate, $100 personal estate, born in Saxony
Kopp, Barbet, 44, female, born in Saxony
Kopp, Mary, 12, female, born in Maryland, in school
Kopp, Henry, 10, male, born in Maryland
Kopp, Fredrick [sic], 5, male, born in Maryland

1880 U.S. Census, Baltimore City, Maryland
3rd Ward, S.D. 1, E.D. 28, stamped page 475, enumerated 1 June 1880 Dwelling No. 25, Family No. 35
114 South Caroline Street
Schmidt, Charles, white, male, age 35, married, musician, born in Maryland, parents both born in Germany
Schmidt, Mary, white, female, 34, wife, keeping house, born in Maryland, both parents both in Germany
Schmidt, Charles, white, male, 6, son, single, both in Maryland, both parents born in Maryland
Schmidt, Julia, white, female, 9/12, born in September, daughter, single, born in Maryland, both parents born in Maryland

1900 U.S. Census, Baltimore City, Maryland:
10th Ward, Enumeration District 124, Sheet 8
909 East Chase Street
Dwelling 131, Household 137
Schmidt, Charles, head, white, male, born May 1845, age 55, married 28 years, born in Germany, both parents born in Germany, immigrated in 1854, 46 years in the U.S., naturalized, occupation musician, 0 months unemployed, can read and write and speak English, owns free
Schmidt, Mary, wife, white, female, born June 1846, age 54, married 28 years, mother of 4 children, 2 of whom are living, born in Maryland, both parents born in Germany, can read and write and speak English
Schmidt, Charles Jr, son, white, male, born February 1874, age 26, married (sic), born in Maryland, both parents born in Germany (sic), occupation musician, 0 months unemployed, can read and write and speak English
Schmidt, Julia, daughter, white, female, born September 1877, age 22, single, born in Maryland, both parents born in Germany (sic), can read and write and speak English

Mary Schmidt died on 28 March 1919 at her residence at 909 East Chase Street, Baltimore City, Maryland. She was female, white, widowed, born 26 June 1846 in Baltimore, Maryland. Her father was Michael Kopp, born in Germany, mother unknown. Information provided by Julia Schmidt of 909 East Chase Street. Died from arteriosclerosis. Buried at Mt. Carmel Cemetery. [Hall of Records, Annapolis, Maryland, microfilm CR-48,179, death certificate D30297.]

The death register of Mount Carmel Cemetery, Baltimore, Maryland, entry #17149, states that Mary Schmidt was buried 31 March 1919, aged 72 years, 9 months, 2 days. She was born in Maryland and lived at 909 East Chase Street, Baltimore. She died of arterio schlerosis. Buried in lot 119 U, 2nd grave from north.