This biography of Samuel Alexander was written by Jim Pickering. Information presented here comes totally from research. Some elements of Samuel Alexander's life are well documented resulting in a high degree of confidence as to the accuracy of the information. However there are gaps in the documentation that have been filled with information from unsourced family trees resulting in a low degree of confidence. Any additions and/or corrections that can be documented are most welcome.
Samuel Alexander was born on 9 April 1812 in South Carolina.
Research Note: Samuel's date of birth is known from the inscription on his grave stone, and his place of birth is documented in US census records plus a one sentence mention of Samuel in a brief biography of a son-in-law.
Research Note: Samuel's father's given name has not been confirmed with definitive information source. There are several family trees on Ancestry.com and FamilySearch.org that include Samuel Alexander that have his farther as Hugh, Huey or James Huey, born about 1772 and died prior to 1830. Some of these family trees have Samuel's mother as Annie or Anna Graham, born 1785 Belfast, Ireland, and died 1880 Calhoun, Columbia County, Arkansas, but her surname at birth has not been confirmed with a definitive information source.
Research Note: The 1830 census for Lancaster county, South Carolina, lists Anna Alexander as head of household. There are two free white people in the household, one male age 15 to 19, one female age 40-49, and 3 slaves. In 1830 Samuel would have been age 18, and his mother, if born in 1785 would have been 45.
Research Note: Given that Anna is head of household, this 1830 census is likely the source for family trees indicating that Samuel's father died before 1830.
Research Note: According to various family trees online, Samuel was married first to Rebecca Allen about 1838 in South Carolina, and second to Mary Brumfield about 1852 also in South Carolina. Marriage records for this time period in South Carolina do not exist other than church records in coastal counties, so neither marriages may ever be documented. Samuel's marriage to Mary Brumfield likely occurred in 1849-1850 (see 1850 census below).
Research Note: The 1840 census for Lancaster, South Carolina lists both a Samuel Alexander and an Anna Alexander as heads of different household. Probably our Samuel and his mother, but unfortunately, the census forms were so poorly marked it is impossible to determine the number of persons in the age categories in each household so the records are of little value except to record the names and that there were slaves at both locations.
Samuel, with first wife, Rebecca, had three daughters who are well documented in Arkansas, and a son for whom there is scant to no documentation. Their children were:
Son possibly with initials I H or J H - born 1839
Charlotte Rebecca - born 1842
Elizabeth Josephine - born 1845
Martha Melvina born - 1847
Research Note: Other family trees that include Samuel show that Rebecca died in 1847, but again, no record or grave has been found to confirm her date of death. However, this date of Rebecca's death does fit with other records.
The 1850 census for Lancaster County, South Carolina, lists Anna Alexander as head of house number 836, and S Alexander as head of house number 848.
House Number 836
Anna Alexander - Female - age 65 - birth place South Carolina
Sarah Wells - Female - age 22 - birth place South Carolina
C R Alexander - Female - age 8 - birth place South Carolina
E J Alexander - female - age 6 - birth place South Carolina
M M Alexander - Female - age 3 - birth place South Carolina
House number 848
S Alexander - Male - age 37 - birth place South Carolina
M Alexander - Female - age 24 - birth place South Carolina
I H Alexander - Male - age 10 - birth place South Carolina
Research Note: If this is Samuel with second wife Mary Brumfield this record implies that Samuel and Mary were married in 1850 or prior. The male age 10 is the only record that Samuel and Rebecca may have had a son in addition to the three daughters.
Research Note: What are the odds that Alexanders with the initials of given names of Samuel's second wife and his children from his first marriage would be found a few houses apart. Assuming his first wife Rebecca did die in 1847, leaving Samuel with four kids ages seven to infant, he would likely look to his mother, if near by, for help with his kids.
The first record of Samuel having migrated to Arkansas is 1 September 1856 when he acquired, in a cash purchase, 160 acres of land being the NE1/4 Section 7, Township 17 South, Range 19 West.
Alexander family history that has found its way into the public domain says that the family lived in a log house while Samuel built a larger house for his family. The "dog-trot" style house Samuel built in 1855 still stands today. In 1979 the house was listed on the National Register of Historic Places.
Research Note: Columbia County, Arkansas land deed records do not support the information that Samuel's house was built in 1855. The house has recently been relocated to the campus of Southern Arkansas University where it will be less susceptible to vandalism as it was at the rural location where it was located when added to the National Register of Historic Places in 1997.  The location indicated, 33019'24"N - 9808'26W does correspond with a deed for land purchased by Samuel, namely SE1/4 section 13, T16S, R20W, but Samuel did not purchase this land until 2 March 1881.  Was this deed recorded incorrectly? Did Samuel build his house on land he did not own? Was the house moved to this location when it was restored in 1955? Note also that Samuel and wife Mary are buried in the Lydesdale Cemetery which is about one mile and a half east of this house location.
2 March 1881 - Lot number 84. town of Magnolia. 
Research Note: At his peak Samuel owned the three tracts of land. The lot in the town of Magnolia, the 160 acres in Township 16W, Range 20W where his house was located, and 880 contiguous acres in Township 17W, Range 19W for a total of 1,040 acres plus the in town lot.
A 1860 Census records of Samuel's family in Arkansas would have been helpful in tying the South Carolina and Arkansas parts of his life together, but he is not listed in the 1860 census in Arkansas or South Carolina. However, Anna or A Alexander is listed in 1860 census for Lancaster, South Carolina, and with only two people listed, A Alexander and Sarah Wells. This implies that Samuel took all his children from his first marriage with him to Arkansas, but his widowed mother stayed in South Carolina.
A Alexander - Female - age 75 - birth place Ireland
Sara Wells - Female - age 30 - birth place South Carolina
There is no evidence that Samuel enlisted in a combat unit of the Confederate forces during the Civil War, but he would most likely have sided with the Confederates. There are a number of records available on Fold 3 showing Confederate pay vouchers in Arkansas payable to Samuel Alexander, Sam Alexander, and S Alexander for provisions. However, given that there was at least one other Samuel Alexanders in Arkansas during this time period the records cannot be confirmed to be our Samuel.
Children of Samuel and his second wife, Mary Brumfield Alexander:
1. Unknown (b 1851 - 1852 NC - d as infant NC)
2. Rosaline E. aka Rossie (b 1854 AR - d 1943 AR)
3. Frances Roxana (b 1856 AR - d 1941 AR)
4. Sarah Alexander (b 1858 AR - d 1868 AR)
5. Harriet Lenora aka Nora H (b 1861 AR - d 1912 AR)
6. John Graham (b 1863 AR - d 1944 AR)
7. Mary Sam aka Sammie (b 1866 AR - d 1945 AR)
8. Annie (b 1875 AR - d 1880 AR)
Research Note: See Mary's profile for more detail on the children.
In 1869 Samuel is listed on the United States Internal Revenue Assessment list, and is being assessed $10 for the occupation of "Stallion Keeper". 
In 1870 Samuel is listed in the United States census for Boone, Columbia County, Arkansas with Mary and only four of their children. His Rebecca children have flown the nest, of Mary's children Sarah died in 1868, and for whatever reason Harriet Lenora was omitted.
In 1880 Samuel is listed in the United States census for Calhoun, Columbia, Arkansas. He is listed with Mary, Rosaline, Nora (omitted in 1870), John and Sammie.
Samuel Passed away 22 April 1889 and was buried in the Lydesdale Cemetry near his house in Columbia, County, Arkansas.  He was joined there by his wife Mary some 16 years later.
↑ 1.01.1 "FindAGrave, Samuel Alexander, Lydesdale Cemetery, Columbia County, Arkansas"
↑ ”Biographical and Historical Memoirs of Columbia County, Arkansas”; Goodspeed Publishing Company, 1890; Copyright 2012, Heart Legacy Publications; My Genealogy Hound
↑ "United States Census, 1830" Lancaster, South Carolina, GS Film 0022507, Digital Folder 005156014, Image 00155, page 76. 
↑ "United States Census, 1850", Lancaster, South Carolina, GS Film 44817, Digital Folder 004205407, Line 13, Household 836. 
↑ "United States Census, 1850", Lancaster, South Carolina, GS Film 444817, Digital Folder 004205407, Image 00378, Line 39, Household 848. 
↑ 6.06.1 "Bureau of Land Management", General Land Office Records, Champagnolle Land Office, Arkansas, Accession Number AR2130_.238 
↑ Deane, Earnie. "OLD ALEXANDER HOUSE." Arkansas Historic Preservation Program..
"Grandson Restores Pioneer Home," Arkansas Gazette, March 11, 1958.
It may be possible to confirm family relationships with Samuel by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Samuel: