From Beyond Experience, p. 157:
“The term “ things ” here is meant in a very broad, inclusive sense. On this interpretation, “ things ” will include, of course, the most familiar things of all, namely physical objects, but will include as well all sorts of nonphysical things, e.g. minds (if indeed they are nonphysical), supernatural beings, numbers, classes, colors, pains, mathematical theorems, places, and events. In short, “ things ” is being used here as a general name for any sort of thing (!) whatsoever that can be named or described.”
This is strikingly similar to what I have earlier written about the onniword “thing”.