Based on the records found we can say that Charles Durham Sr and Daniel Durham were brothers. We can speculate that Charles Durham Sr was born in Virgina because we have records stating his YOUNGER brother, Daniel, as being born in Virginia.
With this information, we know that Charles and Daniel Durham underwent at least 2 migrations. 1) from Virgina to North Carolina 2) from North Carolina to South Carolina.
If we follow Charles, we will notice that records indicate that he was born 1770. By 18 years old, he is already married to Mary Smith in North Carolina. As for Daniel, we learn his bith year as 1777. If he was present in North Carolina at the time of his brother's marriage, he would have only been 11. Furthermore, there is a Census record available titled: "North Carolina Heads of families at the first census of the United States taken in the year 1790." For Chatham, there is a Charles Durham recorded in this census with a total household population of 2. This second person is obviously his wife Mary Smith (she is probably pregnant too :-D, Lucy was born 1791).
Oddly enough there is a Daniel Durham listed in "the first census of the United States taken in the year 1790 in North Carolina." But this can't be Charles' younger brother, he would only have been 13! Interestingly enough, that Census records 20 Durham heads in 1790. They are as listed as follows (from index pg 222): Charles page 88, Daniel 83, Isaac 79, Isaac 83, James 157, James 185, John 76, John 79, John 92, John 92, J** 122, Joseph 155, Kellis 117, Marshall 120, Matthew 92, Samuel 142, Thos 92, Thomas 165, William 92, and William 120.
I am starting to believe that Charles and Daniel's parents, whoever they were, brought them and apparently some siblings to North Carolina. As opposed to the two brothers leaving their Virginian parents and hitching a wagon to North Carolina. I think this Index is the key to figuring out their parentage. I plan on checking out Byron Durhams webpage of Durham families because he has done an awesome job indexing them by state and county. I plant o see if I can match this 1790 index of Durhams with his and see if I can find a link for Charles and Daniel.
From 1790 we can follow the brothers records only to learn they head to Pendleton, South Carolina. Be careful not to confuse Charles Durham with the one in Rutherford, North Carolina. There is another Charles Durham listed in 1800, 1810, 1812, 1820, and 1830.
Anyway, We learn that for Charles, he would have had to left North Carolina between the years 1794 and 1800 since he remarried in 1794 in North Carolina (Mary Fortune). The answer to that question lies with his two daughters Elilzabeth (b. 1797) and Martha (b. 1798). I have them both as being born in South Carolina making his migration year between 1794 and 1797.
As for Daniel, the earliest census record I have found for him so far is 1820 in Pendleton, South Carolina. He could have migrated to Pendleton from North Carolina with his brother or He could have followed his big brothers after Charles got settled. How sure are we that Daniel was in North Carolina?