Back to work

So, this week is the first that I've felt that I'm fully back to work in the sense of a "normal" week in the States.  I had meetings in two different offices -- one in Canary Wharf and one in the City -- yesterday in between working from our office that is in neither of those locations, and had my first 12ish hour day today.  For most of the time I've worked in the States, I'd consider this normal, but it's the first I've gotten back to this level of engagement and "wow, I'm mentally exhausted" at the end of the day.  Granted, the difference here:  At about 7:30, a partner walked over on his way out of the office, genuinely concerned about why I was working so late.  Maybe this is an exception here... and if so, that's a great thing!