Piano tuning in 1854 - correction/addition

Several months back, I posted a quotation from
John W. Moore's 1854 Encyclopaedia of Music under
"Bearing Notes" which implied a straight quarter comma
mean tone temperament with a wolf of about 36 cents
for keyboard instruments. I've purchased a copy of
the encyclopedia which I've been able to read
at more leisure at home. A great deal about
tuning and harmony etc. etc. is buried in
articles throughout the volume. Under "Key"
I found:

"We have observed, in tuning the piano-forte,
the notes F sharp, C sharp, and G sharp, which form
the major thirds of the keys in sharps, are tuned
sharper than the major thirds belonging to the flat
keys. Hence the evident brilliancy of the one, and
tender melancholy expression of the other..."

This passage implies a non-uniform well temperament
for the piano.

I hope to wrestle with the long detailed entries
in the volume to get a better grasp of the author's
musical conceptions.

Dave Hill La Mesa, CA