In the 1890 Bulmers directory Thomas Stamper Peacock (who married Lucy Pearson) farmed at Cowldyke Farm. He was the son of Dennis Peacock and Grace Southeran. Thomas Stamper Peacock and Lucy Pearson had a son called John Peacock. Although I doubt this is your John Peacock as Thomas Stamper Peacock wasn't born until c1858. Are you sure your John Peacock was born c1861?