What is this group of files of JB music?

I am trying to organize my music collection.  I am organizing folders by artists and then the folder structure is by albums under the artists' name.

In doing so, in trying to get organized, I came across a really weird folder of JB songs.

It is a zip file and the folder/album is called "AllJBtracks.zip".   The date on the folder is 2013.  Then inside that zip file are 9 songs but every song is it's own zip file!  The songs are:
whale-that-swallowed.zip
story-of-a-quarry-man.zip
dislocated-boy.zip
lonesone-road.zip
Blue-and-evil.zip
slow-train.zip
when-the-fire-hits.zip
bojh.zip
dustbowl.zip

Does anyone have any idea how I could have gotten this file?  I haven't unpacked it (since 2013!) because I have all the songs elsewhere.  And the files are mp3's and I rip my cd's to wav files for listening.

It's really unimportant but the curiosity is just driving me crazy.