. "L. Junius Moderatus Columella, a well-known writer on husbandry , in the first century of the Christian era. He was of Gades , and a companion of Seneca and Celsus;" . "L. Junius Moderatus Columella, a well-known writer on husbandry , in the first century of the Christian era. He was of Gades , and a companion of Seneca and Celsus;" . .