It appears from your work that you have searched the census, so I won't bother you with that information, or conjecture/guesses as done before.
The book "History of Iowa County, Iowa and its people", authored by James c. Dinwiddie, 1915, 708 pages.
Chapter III.Organization and Government of Iowa County.Organization Act.
---Iowa County was thrown open for settlement in 1843, shortly after the Indians had departed.During that year there were many settlements made and n the following autumn and winter months the necessary legislation was secured in the Territorial Legislature, then in session at Iowa City, authorizing the organization of the county.The act was approved early in the year 1845 and was entitled "An act to organize the County of Iowa and to provide for the location of the seat of justice thereof."The full act read as follows:
"Section II.Thomas Henderson... ; and Stephen B. Garner, of Johnson County, be, and they are, hearby appointed commissioners to locate and establish the seat of justice of the County of Iowa.
... Selection of County Seat
Action was first taken in regard to the selection of a county seat on August 16, 1845. ...and Stephen B. Gardner from Keokuk...were the persons appointed by the legislative act to select the seat of justice.
Chapter XIII.The City of Marengo.The Beginning.
The original Town of Marengo was located as a seat of justice of Iowa County on August 13, 1845, by the three commissioners appointed by the Territorial Legislature: ... and Stephen B. Gardner of Johnson County.
--due to the age of "your" Stephen, probably not the same one, but possibly a relative.
The book, "James Harlan", authored by Johnson Brigham, concerning Genealogy and local history of Iowa City, IA, 1913, has this reference:
Laws of Iowa, 1842-1843, pp 75-81.The Trustees named in the act were as follows: ... Stephen B. Gardner...
--But, this Stephen B. Gardner was to young to be the person of interest, but perhaps a relative.
The 1840 Census for Johnson County, Iowa Territory, shows Stephen B. Gardner as Marshalls Assistant, identifying Totals for the county.
The 1850 Census for Iowa City, Johnson County, Iowa:
John Gardner, age 46, born in NC, for employment, dittomarks lead to the top of the page to the word "Farmer".
Margarett (as spelled), age 42, born in Iowa
Aaron, age 19
William P, 16
Stephen B, age 8
Benjamin F (as transcribed), age 6.All children born in Iowa.
Also in Iowa City, Johnson County, Iowa
Stephen b. Gardner, age 46, clerk of District Court, born in N. Carolina
Margarett (as spelled, age 52, born in MD (Maryland)
Barbary (as written) Nickols, age 12, born in PA (Pennsylvania).
Now, let's forget the possible connection between John and this Stephen B.
Here are the facts you want:
Stephen B. Gardner born November 1841 was the son of John Lucian Gardner and margaret Harris 1807.He had children of
Deids W, 1874
John was born 1805 in deep River, Guilford, North Carolina to James G 1776-1825 and Elizabeth Starbuck 1873 and 1865.He married Margaret Harris born 1807 and had children
William P 1834
Stephen B 1841
Benjamin F 1843
All of the connections are attribued to Alamojim@satx.rr.comWrite to him down in San Antonio, Texas and he can give you the rest.