Dear Mr. Reinhard

>The primary source is Bosanquet (an authority well-respected by Alexander
J.
>Ellis as evidenced by his regular mention in the Helmholtz book.

Johnny, let's see what Ellis himself has to say on the subject (p. 434):

"Handel in his Foundling Hospital organ had 16 notes, tuned from db to a# in
the series of Fifths [. . . .] Father Smith on Durham Cathedral and the
Temple organ had 14 notes from ab to d# [. . .]"