Bernard,
1) I admit I obviously was confused in the haste mixing the two instruments up.I haven't found a comfortable way sorting up quotations in this forum - yet - so my memory slipped.

2) Transposing still is a bit confused.I sympathize with this:
"I use the term 'transposing' in its original classical sense - you play a note which sounds in a different pitch from the notation"

and I use the term likewise...so we ought to find some agreement..:-)

3) You in turn got *me* wrong in this:
"I don't understand what you mean by 'all keyboard instruments transposing', which they certainly do not".

I didn't say so, I said:
"don't you expect all keyboard *notes* (not 'all keyboard *instruments*') to be transposing a specific interval up or down?"

And this means if only the Bs and Bbs have changed place the D#s will remain NOT transposing inspite all other 'keyboard notes' will be transposing a fifth down.Consequently - IF that baritone actually was completely transposing it either must have had the D#s replaced by C#s but you didn't notice, or it actually was not 'completed' as a transposing instrument.Isn't that right?

4)"Wheatstone called it a Bass/Baritone/Tenor, which is a straightforward way of indicating the range of notes it can play".

I remain confused since I have never seen Wheatstones calling anything like that and I remain a little bit doubtful since IF you would like to express the range in that to me strange way it ought to be sufficient to call it a '62(or64?) key bass' or maybe 'basstenor' since 'baritone' comes in between anyway unless it was meant to point out that it had the normal fingering of a baritone but was extended both into the bass range (likely down to c2) and into the tenor range (likely up to f3 or g3).I have seen some other instrument with that layout. How many keys did it have? - 62 or 64?
The "original paperwork" is that really from Wheatstones? Curious to know since I am a bit obsessed by historic instrument confusions...:-)
Wheatstones and other makers have changed terminology now and then,I wonder if they were a little bit confused as well...
Goran