Person:Thomas Frost (18)

1860 U.S. Census Frostburg, Allegany Co., Maryland
Thos. H. Frost 39 M 350 2,000 MD
Laura Frost 28 F NJ
Bruce Frost 7 M MD
Wallace Frost 5 M MD
Thos. Frost 3 M MD
Howard Frost 3/12 M MD
Honora Kenney 24 F servant Ireland

1870 Census North Union, Fayette, Pennsylvania
Post Office: Connellsville
Frost, Thomas H. 49 M W Farmer MD
Frost, Laura C. 36 F W Keeping House MD
Frost, Wallace 15 M W Works on Farm MD
Frost, Thomas 13 M W at home MD
Frost, Frank 9 M W MD
Frost, Mary 7 F W MD
Frost, Joseph 4 M W PA
Welch, Mary 24 F W House Keeper PA

1880 Census Pittsburgh, Allegheny Co., Pennsylvania
Thos H. Frost W M 58 married Grocery Wholesale MD MD MD
Laura Frost W F 50 wife married keeps house NJ NJ NJ
Wallace Frost W M 24 son S Clerk MD MD NJ
Lydia Frost W F 22 dau-in-law married at home PA PA PA
Thos. Frost W M 22 son S Clerk MD MD NJ
Frank Frost W M 20 son single Clerk MD MD NJ
Mariah Frost W F 18 dau single at home MD MD NJ
Joseph Frost W M 15 son single at home PA MD NJ
Anni Coleman W F 18 servt single servant PA Germany Germany

(NOTE from book "The Descendants of Josiah Frost, Frostburg, Maryland" by Charles George Frost (1998): The obit in Pittsburgh Post Gazette for JUL. 22,23,24 reads 1899; grave stone in Frostburg Mem. Cemetery shows 1889.)
Find-a-Grave has a memorial for Thomas that does not agree with the Pittsburgh City Death record and there is no photo to verify the date.

Pennsylvania, Pittsburgh City Deaths, 1870-1905 at familysearch.org
name: Thomas H. Frost
event: Death
event date: 21 Jul 1889
event place: Pittsburgh, Allegheny, Pennsylvania
gender: Male
age: 68
estimated birth year: 1821
birth: Frostburg, MD
burial: 24 Jul 1889
burial: Frostburg, MD
digital folder number: 4672716

1. ↑ United States. 1860 U.S. Census Population Schedule. (National Archives Microfilm Publication M653)
   Frostburg, Allegany Co., Maryland.
2. ↑ Website: Frost and Gilchrist Families (frostandgilchrist.com/familygroup.php familyID F3698 tree frostinaz01).
3. ↑ Allegheny County (Pennsylvania). Clerk of the Orphans' Court, and Allegheny County (Pennsylvania). Register of Wills. Registration of deaths in the city of Pittsburgh, 1870-1905. (Pittsburgh [Pennsylvania]: C. Edwin Hultman Co., 1976).

   Location only.

4. ↑ ^4.0 4.1 Allegheny County (Pennsylvania). Clerk of the Orphans' Court, and Allegheny County (Pennsylvania). Register of Wills. Registration of deaths in the city of Pittsburgh, 1870-1905. (Pittsburgh [Pennsylvania]: C. Edwin Hultman Co., 1976).
5.   Boucher, John N. (John Newton), and John W. (John Woolf) Jordan. A century and a half of Pittsburg and her people. (New York: Lewis Pub. Co., 1908)
   3:270.
6.   United States. 1870 U.S. Census Population Schedule. (National Archives Microfilm Publications M593 and T132)
   North Union, Fayette, Pennsylvania.
7.   United States. 1880 U.S. Census Population Schedule. (National Archives Microfilm Publication T9)
   Pittsburgh, Allegheny Co., Pennsylvania.