For me this was a puzzle of two halves. The grid fill was reasonably straightforward although I was held up for a time in the NW corner. I then made my life unnecessarily difficult by doing an internet search for the four places visited on the journey. This took me down a very deep rabbit hole that it took me a full day to reemerge from.
Once back on the right track things fell into place relatively quickly, although I was held up again by the search for the keyword. Re-reading the source material was very enjoyable and triggered the PDM. I will miss Dysart's puzzles.
A heartfelt thank you to JEG for enabling us to pursue this strange hobby of ours, and best of luck to the new marker who is taking up this daunting task.