Hi Mary,
Yes, I see that Eden was a whaling hub, so I did some old newspaper searches for info on Cecilia's mother and second husband (Thomas Shering), but have found nothing under Twofold bay. As you say, they must have followed the whaling teams down to Twofold bay. Nothing on George Morris death certificate about time in NSW, but he was obviously there for at least 4 or 5 years because that's where he and Cecilia's first son was born. But I shall keep digging, occasionally the odd piece of information comes along.
James.