All done - but only after guidance from a most obliging source ! Was on completely the wrong track to begin with as I had hazarded the wrong 28A, looked it up in the BRB and found that, at the end of the definition of its second entry, it said : "orig. marking the dropping of e" and so I had obliterated all the "e" grid entries ... what was I thinking ? And what relevance to anything else ? (But could make good puzzle base on another day) ... Anyhow, steered back to the right path (or left path, depending on your view), 'tis now in the envelope ....