Let me say that I am very grieved to have caused Mysha distress, or in any way made the thread go 'sour' on him

There were a couple of phrases in his post to me -

("Assuming you're not talking to yourself," --
"did you just not have a reference work handy?")

which I interpreted as somewhat truculent, or at least argumentative, in tone, and replied in what I regarded as an appropriately disputatious fashion. If I over-interpreted his intention, I do sincerely apologise for his finding my response more aggressive than was warranted by the occasion. I have no desire to quarrel seriously with anyone on this forum ~~ I have learnt better over the years!

Pax, then? ~~

~Michael~