I've already passed it on to Michael Quinion at World-Wide Words. We'll have to wait a few days to see if he can answer the question.

Meanwhile, there's a new series of "Quote Unquote" starting on Monday (rpt Sunday), but I expect most or all of the programmes have been recorded already. I'll leave it to you to have a go at Nigel Rees, but I'm not sure if he charges for that kind of thing.

Steve