You'll notice that the 1st 2 children were buried at 7 feet, the next 2 at 6 feet then 2 adults, one at 5 feet and the last at 4 feet.
It would be strange if there was no relationship between the Bowmans and the Taggarts and I doubt very much if this would have been common ground/a paupers grave. Too much of a co-incidence as these burials were basically just wherever there happened to be 'space'.
Obviously adults were buried 'longways' in the lair, which was usually 3 feet x 7 feet, but children (if young/small enough) were buried 'across the way'.
A bit morbid, I know, but when you see stones with a long list of children, this burial 'method' goes some way in explaining how they were all 'fitted-in'.
Anne