The same researcher, who kindly provided me with information about Richard and his family, sent me this material about his paternal grandfather
"RIchard's grandfather (also called Richard) was a clock and watch maker in East Retford, Nottinghamshire,and some of his clocks still exist today - they will be around 200 years old now, and can sell for about £1000.
If you look very closely at the clock face, you will see the name 'Richd Undy' and the words East Retford. Richard the clock maker (1777-1855) was also a farmer in later life, and he was quite a wealthy man - which could well be where the money came from, which Richard the grandson left to his widow, Mary."
CHRISTENING - 17 March 1778 - father Richard (1739 - died 1781
DEATH 8 JUL 1855 • Mattersey Thorpe, Nottinghamshire
Undy Hill worked in Renishaw Ironworks and the photo was taken in the 1940s or 1950s, according to his grandson. I think it's a great picture, don't you! It makes me wonder whether his uncle Richard looked similar to him."