Thanks
Essex for providing the text, and I DO trust that it is the verbatim, as anything less would be blasphemy.
Again, not to nitpick (but that's how this will appear

), but the text says nothing in regards to whether Gandalf's hand is on his staff or not. Presumably, if he were not mounted, he would have his staff in hand.
Surely you will give me something else to consider after reading the above, but in anticipation, as an example of 'item not mentioned explicitly, therefore...' I would point out that the Three Elvish rings were all in use, yet I can't remember any references such as "Elrond used his ring to" etc.
I really need to get those books out as (1) I hate trying to make a point based on memory and (2) this forum is making me want to dive in, yet again.
I like
Formendacil's comments regarding the staff being a symbol of office.