Some thoughts to ponder, leading nowhere in particular.........
The inscription for Margaret HEASTIE was made 1813, or later.
The inscription for John HASTIE and Simon HASTIE was made at the one time, same style of lettering. That inscription was made 1832 or later. As it has a day and date, we could work with the idea that the inscription is contemporary with the death of Simon, at which occasion, the death of John was also memorialised.
This second inscription was placed high up, and directly underneath the earlier inscription for Margaret, and leaving .....how much space below for additional inscriptions?
How was this burial plot, and the headstone intended to be used?
What does the whole headstone look like?
"died at SEA"...I wonder what that means in the currency of words used at that time and in that place? Is it different to "lost at sea"? What words do you see on other headstones in the cemetery for people whose death was associated with the sea?.
Do other headstones for such deaths include a location?....Atlantic, North Sea, etc?
In this cemetery are other members of this HASTIE family (close family, same generation) also buried?
You might expect that there was another family death between Margaret, 1813, and Simon, 1832.
Was this burial plot reserved to record deaths / burials for siblings?. Was Simon married, did he have a family.
John's death has only a year. Was this a ship that was lost with no survivors?
Was this good quality stone...survived for such a long time, with inscriptions intact and legible.
Did Simon leave a Will?