the two volumes were not distributed together, but separately, a week apart; consequently, it is perfectly possible to have either volume from (& as) new without the other - as yr hmbl srppnt. has #1/2 - and there is no cd nor cd sleeve with the cat# "bp-31794/bp-31795" - so the two should be listed separately-but-consecutively (by date of release and by cat#) here.
I think that when the volume 2 of this cd came it will have been put in a card sleeve, ready to put the CD into the gatefold sleeves that came with volume 1, as my sleeve does not have the cut-out for easy access to the disc!
Added composers details [14-3-15].
I have the Volume two case sleevefor this CD, but the card sleeve is different to dr.pepper1952's Inside Cover image. Unfortunately my sleeve got covered with stickers and would not scanneable!
However, I've put on both the images [22-3-15] in hope someone could have a decent set of images to replace these!