Surely prayers were aimed to ensure that the members of royal houses lived longer than they otherwise would, rather than longer than average.
While I am ignorant of the levels of 'prayer effort' during the relevant periods, I would imagine that the longevity of the subjects of Galton's study would compare favourably with that of Lady Jane Grey and various members, from time to time, of the household of Henry VIII. Pray on if you will.
I remain, Sir, yours,
7 SeptemberReuse content