The following link from the Library of Congress digital collection corroborates our earlier findings on the first 20 or so Blacks in the Virginia Colony -- They were traded as 'Indentured Servants.'
"The first African slaves are brought to Virginia by Captain Jope in a Dutch ship. Governor Yeardley and a merchant, Abraham Piersey, exchange twenty of them for supplies. These Africans become indentured servants like the white indentured servants who traded passage for servitude. John Rolfe to Edwin Sandys, Jan 1619/20, "About the latter end of August..."
Scroll down to the bottom posting on the link to Aug. 1619 --
This is primary source documentation. You simply cannot follow anything but primary source research in your studies. The British did not enter the slave trade until 200 years after the Portuguese and Spanish, who had learned about slavery via their treatment by the Ottoman Empire slave trade of whites.
Umm, i'm not sure about this "official" account from that digital collection..
We must remember that Africans for that period landed in present-day Florida in the early 1500s.. Plus, those who landed in the Virginia colony(1619) were not the first enslaved Africans because the Spanish brought enslaved Africans to our mainland (1560s), again in Florida.
Now here's the thing: I am one of those who remain skeptical that the early Africans in Virginia were brought in as "indentured servants", pretty much like the early Irish. From my late readings, there was a big difference between the white indentured servants and what the so-called African indentured servants went through or experienced! But then....