Jerome J. Pollitt

However, I am not sure there is nothing in that story.

and here I really am influenced most strongly by my colleague, Professor Jerome Pollitt, now retired, who was our history of art and archeology guy, who has a notion that is very nuanced and sophisticated and it appeals to me quite a lot.

He suggests that there were indeed Greek tribes from the north who spoke Dorian dialects, who came down during this period attempting to come into the richer and better settled world of the Mycenaeans, and they didn't come down and then go away for a hundred years and then come back, but rather they came down in waves of tribes and families and so on.

exerting gradual pressure, pushing in when they could, retreating when they couldn't, and so on.