I hope to respond more fully directly to Brown in due course. I doubt that the idea could be expressed better than this. There seem to be physical facts that have a first-person element. But the matter is not all that clear. Max Deutsch claims that subjectivity is not so much an indexical matter as an epistemological one.
Facts are subjective when they are knowable only in a certain way.
I would argue, however, that they are so knowable only because they are indexical. We go round and round about this. I'll remember that. A musician and a non-musician listened to a bit of music. The musician heard a beautiful melody.