Good question. Far as I can tell, it's a miscommunication between the inestimable Bob Waltz of the BI and myself. Fault is mine, I failed to be clear.

I listed 146 versions of #243. This was intended as the total, including appendix.

Since it took a while to go through it all, I did not include appendix in the initial material for volumes I & II. By the time I got to V. III, I saw I should include appendix items with the main listing. I then went back and addended Vols I & II that I'd already sent to Bob.

Bob may likely assumed the totals for Vols. III & IV failed to include appendix.

This was 2002 so I don't really remember the sequence - can barely what I did this morning.

The discrepancy likely is only to the extent of the number of items in the Appendix covering ballads in Volumes III & IV. (Few.)

I'll have a look.