I bet they put down it's due to rampant opium and cocaine consumption. some Immortals are worried it's the gathering starting but they don't feel any murderous urges... or more than normally anyway

the twitchiest of them try go to the far sides of the empire or at least far from London...

Methos is very glad about that, Irene/Amanda not so much she has a fondness for her Immortal and Chivalrous friends having them away from Europe doesn't make at all happy

especially as the ones staying seem to be the ones which don't care about those "modern" values and she can't escape