1807 - The United States Congress passes an act to "prohibit the importation of slaves into any port or place within the jurisdiction of the United States ... from any foreign kingdom, place, or country."
... of English alveolars like t, but with the tongue curled back) (t, th, d, dh, n)
Dental (tongue against teeth, like Spanish) (t, th, d, dh, n)
Labial (with the lips[?]) ...