> Thanks Dave - I wondered if James Fox was a "onenamer" and if this would > prove to be the answer. And I did read to the end of your reply and, I > think, understood the principle. > Now another question - what happens when the second keying is done and there > are now three entries for some of this particular batch of "Friends"? As the software stands at present, the double keying would align onto Steve's keying, and we would see one single keyed and one double keyed in the results For the Manchester James. All the others would simply appear as double keyed (the system makes no distinction between double or triple or 21-fold keying of a record) The challenge that faces us is to tweak the software to cope with this, and it will be a challenging bit of software to write, for there are no easy fixes here.