That list isn't perfect. I wrote down for my own list, which uses Hyperion's website as well as the booklet that comes with Howard's Hungarian Rhapsodies recordings, that it's 212a -- though I may have done that because there's nothing else that IS 212a. Unfortunetly my Vol. 57 is tucked behind who knows what and I can't get at it right now
![Sad :-(](./images/smilies/icon_sad.gif)
Hyperion's site (which doesn't give a number at all) says it's PD though, so that may be true.
What I mean, though, was that most likely a catalog number with a letter will have been published too late to be PD, since most of them weren't known by Serle, who did the cataloging.