Appears in the 1790 census in Dunbarton, Hillsborough County, NH with 5 other free persons.
Page 546: Excerpt
Caesar Porter, and wife Chloe lived in Plymouth. He was not taxed, and the only mention of him found is the record of the birth, of "a copy of his sire in face and gesture" as well as name and color. "Caesar Porter and Chloe, his wife, had issue, Caesar Plymouth, free born at Plymouth, April 22, 1775."
Source: "History of Plymouth, New Hampshire; Vol. 1, Narrative-Volume 2 Genealogies," Volume 2 by Ezra S. Stearns 1906
Caesar Porter born April 22, 1775 in Plymouth, Grafton, New Hampshire to Caesar Porter and Cloe.
Source: New Hampshire Birth Records, Early to 1900 at familysearch.org