Pensees is a 7 letter English word. It's valid Scrabble word worth 9 points. It's valid Words with friends word worth 11 points.
You can make 64 anagrams from letters in Pensees (eeenpss).
The allusion is to a passage in the philosopher's "pensees."
Poor Ophelia (in Hamlet) gives rosemary for remembrance, and pansies (pensees) for thoughts.
The 'pensees Philosophiquiest' drew upon him some temporary inconvenience which had no disagreeable consequences.