I can confirm that you have the correct couple and their offspring of 9 children.

With reference the gravestone, I have visited the plot (weathered Gravestone at Peel Cemetery plot 415 section 1, right side of chapel and position is 6 down and 5 in from right) and the weathered gravestone appears to date Hugh's age as 53 and I couldn't see any indication that the 3 was an 8. (However, the 8 would take his age closer to within 3 years and 'maybe' the weather has changed it from an 8 to a 3?)

Unfortunately, I've had my orders and I'm doomed to insulating and boarding the loft and might not be out for a while.
Thanks for the info Douglas and will attempt to get out to check this out when I can.
Slaynt vie, Paul