Readers of theTelegraphLetters Page will be fondly aware of the eclectic combination of learned wisdom, wistful nostalgia and robust good sense that characterise its correspondence.But what of the 95 per cent of the paper's huge postbagthat never sees the light of day? Some of the best letters inevitably arrive too late for the 24/7 news cycle, or don't quite fit with the rest of the day's selection. Others are just a little too whimsical, or indeed too risqu, to publish in a serious newspaper. And more than a few are completely and utterly (and wonderfully) mad. ThankfullyIain Hollingshead is on-hand to give the authors ofthe best unpublished letters thestage they so richlydeserve. Baffled, furious, defiant, mischievous, they inveigh and speculate on every subject under the sun, from the rubbish on television these days to the venality of our MPs.The sixth book in the bestsellingUnpublished Lettersseries, with an agenda as enticing as ever, As I Was Saying...will prove, once again, t