Two students named Boykin attended the Mordecai school:
Eliza Boykin from Smithfield was at the school for three sessions, mid-1815 to the end of 1816, with Simon Boykin as the adult name attached to the account.
Evelina Boykin, also from Smithfield, was also at the school from mid-1815 to the end of 1816, also with Simon Boykin taking responsibility for her account.
The notation in the ledger page for October 1815 says "Simon Boykin for Eliza and Evelina." Another notation at May 1816 just says "Majr Boykin," and at September 1816 there's "Maj. S. Boykin" making another payment.
I'm going out on a limb and guessing that Eliza and Evelina are kin. ;) Not necessarily sisters; they could be cousins. But first: Smithfield VA or Smithfield NC? Smithfield NC still has a Boykin Motors listed among its major local businesses. But Smithfield VA (home of Smithfield ham) has Fort Boykin Historic Park, on the James River. A Simon Boykin of Virginia seems to have been a Revolutionary War officer, but there were a handful of men named Simon Boykin, all in the same family, including sometimes brothers (who went by Simon Jr. and Simon Sr., and named their sons Simon just to keep things interesting).
One interesting tidbit emerges from the mess of Simons: Major Simon Boykin (of Smithfield VA) had a daughter Louisa Boykin (1791-1850). She married a Daniel Boon (1786-1870--not the Daniel Boone), and they had a number of children, including daughters Eveline and Eliza, both born c. 1815. Were the Boon daughters named for Louisa's sisters, who would have been young teens and soon Mordecai students at the time? To complicate things, this Boon family seems to have lived in Smithfield NC before moving West in 1835.
So, which Smithfield? Which Boykins? Surprising that the rather uncommon name "Evelina Boykin" gets no useful hits, even with various spellings. So she doesn't turn up in marriage records or cemeteries or even family genealogies (not so uncommon for daughters, especially if they don't marry or die young). Or maybe she just used another first name for most of her life? There are several Eliza Boykins who might be the right age to be the Mordecai student, but not much about any of them.
Anyone want to claim the Boykin girls?