In case anyone is interested in a number: Just did a scan of my own database of about 3.8 million records. 1,019 records contain the left half or right half of the double ligature or tilde, without the nearby complimentary character. Obviously, these will have to be reviewed before our local shift to Unicode. Our own collection isn't particularly strong in Slavic materials, so our incidence of this condition may be lower than that found at other institutions. Gary L. Strawn, Authorities Librarian, etc. Northwestern University, 1970 Campus Drive, Evanston IL 60208-2300 e-mail: [log in to unmask] voice: 847/491-2788 fax: 847/491-8306 Forsan et haec olim meminisse iuvabit.