- After John was brought to Ystumllyn, he was either baptised at Criccieth church or Ynyscynhaearn church near Pentrefelin, Criccieth
- He learnt to speak and write in Welsh and English, and he was taught gardening in the grounds of the mansion.
- He was very skillful with his hands too: he could create wicker baskets, wooden spoons and small boats, and he was a good florist.
- 1768: John married Margaret Gruffydd at Dolgellau, after both had left the households in which they were employed without permission.
- He worked as a land steward at Ynysgain Fawr near Criccieth.
- Eventually John was offered a place at Ystumllyn.
- By the end of his life, he was working for a branch of the Wynn family at Maesyneuadd, Llanaelhaearn.
- John and Margaret moved to a new home, Nanhyran, given by Ellis Wynn in recognition of his service to the Ystumllyn family.
- John and Margaret had seven children.
- 1786: John died of jaundice and was buried in Ynyscynhaearn churchyard.
‘John was in love with Margaret Gruffydd, one of the maids who was later employed in Criccieth. When Margaret went to work in Dolgellau, John followed her and they got married in 1768.’ – Welsh Historic Gardens Trust, no. 77 (Spring/Summer 2019), p. Page 19