In response to Daniel 's review Clarence Weiant wrote a letter to the New York Times supporting Van Sertima 's work .
Clarence Weiant had worked as an assistant archaeologist specialising in ceramics at Tres Zapotes and later pursued a career as a chiropractor .
In response to Daniel 's review Clarence Weiant , who had worked as an assistant archaeologist specialising in ceramics at Tres Zapotes and later pursued a career as a chiropractor , wrote a letter to the New York Times supporting Van Sertima 's work .