Although it may not sound like it, Leise flehen die Lieder (The songs beckon softly) is derived from Schubert's songs. An accompanying figure from one, characteristic motifs from several places, harmonies from others. These are worked up into a repeating form like those Schubert used.

I wrote on Facebook about the performances of Six Haiku after Bashô that the Portland Percussion Group played in May and July. I didn't write a post that I can refer back to.
The group gave the piece second prize in their "Nothing with Wheels" call for scores in 2015, and have played it a couple of times and talked about recording it. I recently found a review of the concert Drums along the Pacific. Henry (no relation) gets the lime-light, but he led a very interesting life. I get a small mention at the very end, but it is nice to be noticed.
I have added a link to the score of Six Haiku (click on the frog). Sorry that it is not the clearest or most beautiful score I have ever produced.