It will not surprise
Heather to know that a day or so before she made a comment about the word 'whilst' GB and I had been talking about it - and about the difference between 'while' and 'whilst'. In fact I had made a note - "While I think on, I shall do a note to myself that whilst I am at GB's I must check when it is appropriate to use while and when whilst is more suitable."
There are some circumstances in which GB and I find it natural to use 'while' and some where 'whilst' seems the appropriate word. But could we explain to ourselves what those circumstances were? No! So we turned to Eric Partridge's 'Usage and Abusage'. That didn't help.
It informed us that the 'st' forms of words like 'whilst' and 'amongst' are becoming outdated - partly because they are less easy to pronounce and partly because they are less euphonious (pleasant-sounding or agreeable to the ear). I don't agree with either statement.
I read a lengthy number of contributions about the subject on a website and whilst they were interesting they didn't really inform the debate. It seems that in North America the natural form is 'while' and the comment was also made that in the UK 'whilst' is only used by 'people of a certain age'. Thanks - I really needed to hear that on a day when my bones were creaking!