If you know this much information about Lekeu already, maybe you don't really need the booklet.
Lucky me – I found a link to the booklet on another site. Here it is, in case anyone else wants it.https://www.outhere-music.com/uploads/booklets/55d6ece745cad.pdf
I'm usually not a big fan of reading booklets, though I do try to add the year of composition to all the classical music tracks in my collection. With this goal in mind, I found the revised Lekeu booklet perfect – a year-by-year (even month-by-month) discussion of all of his compositions; also even noting the three or four undated compositions, and making sensible guesses about when they were likely composed based on their style, sophistication, and whatnot.
So if you're the kind of listener who likes to listen to a composer's works in chronological order, this booklet is great. The dates given are also almost certainly more reliable than the dates found on wikipedia or naxos music library or arkivmusic.
By the way, there's no composer thread for Lekeu; otherwise I'd post this kind of detail there.
I know, I know – I probably should start one.
For what it's worth, though, the music on this disk is really excellent and highly recommended to anyone who likes French late romantic music.