He has fallen back into his normal routine of staying up late and sleeping in. The time zone change from the UK temporarily had him going to bed in the late evening (instead of wee hours of the morning) and waking up in the morning (instead of early afternoon).
He and a friend went off to ride bikes tonight. He really is acting like he feels better than he has at any other point during treatments.
It look like he is starting to get wisps of hair on his head over the tumor area. Hopefully that means it will all come back eventually.