Without seeing the Fielding's example, then it's not a done and dusted matter so to speak, but assuming the connection is correct then a helpful lesson for all of us drinking glass collectors. However, if you look through the books, then as a type specimen, this example shows characteristics not associated with an ale glass, usually.
Sorry, I can't add anything of any real use, and most of the following is only quoted from the books anyway, but.........
Booze was certainly much stronger in the C18, which is why bowls were a lot smaller - and the same century provides examples of ales with one or more knops, cutting, and often decoration by way of engraved hops/barley etc. - but virtually all are taller than this one. The Fieldings example, quoted at 13.5 cms. equates to 5.5/16", which is a little more like an ale height - and would suggest a late C18 or early C19 date.
Dwarf ales do, of course, get down to the height of Bernard's, but they are a different kettle of fish entirely.
The fact that this example sits on the foot proper (the foot appears quite flat) as opposed to the edge of the foot rim, suggests strongly that this is a C19 glass - and makes it all the more unusual as an ale. The ground pontil is less of a real help since this can appear on glasses from roughly 1760 to anytime onwards (for quality glasses) - but probably fades out around 1860/70 ish for more utilitarian pieces.
Bernard doesn't comment on the colour of the metal - this would be useful to know.
The small 'C' shaped bubble would appear to be simply trapped air when attaching the bowl to the stem. Collars were often a way of hiding irregularities at this join between the bowl and the stem.
For what it's worth I am inclined to think that Bernard's example is not an ale - but rather a wine of some description OR perhaps an unusual rummer, and from somewhere in the first third of the C19.
Would be very useful to have Peter's view on this glass.
However, a very interesting glass, and one which I would definitely keep.