500
"Adams: ...Unless I drove 85 miles an hour over those endless roads-he waited for me at every other mile. I would see his figure, shadowless, flitting before me, still in its same attitude, over the cold and lifeless ground, flitting over dried up rivers, over broken stones cast up by old glacial upheavals, flitting in the pure and cloudless air..."(460-468). What does flitting mean as it is used in this passage?
to move lightly and swiftly