Verifying Information: Samuel Reed

Verification is a continual process.  As I "polish" my data, I will share with you my sources and even some questions, too. 

Birth.  The prevailing wisdom is that Samuel Reed was born in Ireland.  1750 and 1751 are dates I have seen online, especially on Ancestry.com's trees.  Does anyone have a clue as to the origin of this date? 

Residence in 1800:  "South Side of Edisto River;" listed as Samuel Read.
Shows 2 males 0-10 (John and Samuel); 1 male 10-16 (Hugh); 1 male 26-45 (Samuel); 3 females 0-10 (Rebecca, Lavisa, Margaret); 1 female 10-16 (Jane); 1 female 26-45 (Mary)
Source:  1800 Federal Census; Census Place: Orange, Orangeburg District, South Carolina; Roll  49, Page 505, Image 113.

Residence in 1810:  Barnwell Township, Barnwell County, South Carolina; listed as Samuel Reid.
Shows 1 male 10-16 (son Samuel); 2 males 16-26 (Hugh and John); 1 male 45+ (Samuel); 2 females 0-10 (Ellen & Mary); 2 females 10-16 (Lavisa & Rebecca); 2 females 16-26 (Margaret & Jane); 1 female 45+ (Mary).
Source:  1810 Federal Census; Place: Barnwell, Barnwell, South Carolina; Roll  60, Page 162, Family History Number 0181419, Image 00092

Residence in 1820:  Barnwell, Barnwell County, South Carolina
Shows 1 male 16-26 (son Samuel); 2 males 45+ (Samuel & unknown male); 1 female 10-16 (Ellen); 2 female 16-26 (either Margaret, Mary, or Lavisa); 1 female 45+ (Mary).  
Source:  1820 Federal Census; US GenWeb Archives, Index of 1820 Barnwell SC Census (http://www.usgwarchives.org/sc/barnwell/census/1820/0009a.gif)

Death:  About November 1, 1823
Will:  Recorded November 14, 1823
Source:  South Carolina Department of Archives and History website (Reed, Samuel of Barnwell District, Will Typescript (MSS Will: Book B, page 186; Estate Packet: Bundle 42, Package 1).  Link: 
http://www.archivesindex.sc.gov/onlinearchives/Thumbnails.aspx?recordId=296532