As Hetty has been accused of causing the disturbances, her age is a matter of interest.

Girls of twelve or thirteen are usually implicated in these affairs.

Hetty was probably several years older.
{220} 30th January, 1717.
{221} Glanvil's Sadducismus Triumphatus, 1726.

Preface to part ii., Mompesson's letters.
{222} Gentleman's Magazine, November, December, 1872.
{223} This happened, to a less degree, in the Wesley case, and is not uncommon in modern instances.

The inference seems to be that the noises, like the sights occasionally seen, are hallucinatory, not real.