Thank you for all your trouble, David. At least the avenue has been well explored, even without result.
The accounts are written by a Scot, so the dates always change in January, not March. I looked again to see if I could have mistaken the year, but the family were in Naples by December 1731, and it definitely says Cyrus was buried in Bath, so no reason to doubt the 1730. Another servant, John Runciman, died while the family were in Bristol in summer 1730, and it is specified that he was buried in Clifton, at an even more expensive £4:12:6d.
Regards,
Lesley