Who was the 'friend' who visited the farmer? Why did he lose his temper at Gulliver? What advice did he offer to the farmer?

The "friend" is one of the master's neighbours. Gulliver was laughing at him because his eyes appeared like the full moon shining into a chamber at two windows. The man told Gulliver's master to take him to market and put on a show. He thinks the master can make good money from this.