And finally, Dame Catherine graduated with her degree.
While her children opted against careers in the sciences, her curiosity about the natural world did rub off on her granddaughter.
"She has been a pretty big influence and has always been interested in what's out there," Jacqui Tizard said.
There were holidays in Coromandel, where Jacqui learned how to dive and where her grandmother taught her how to shuck oysters.
It all stayed with her, inspiring her to pursue a career as a biologist.
"I was tickled pink when she decided to major in biology - I thought that was great," Dame Catherine said.
"But I've stayed out of her hair, mainly because the sort of biology that is taught now is much more cell-oriented than body oriented.
"I mean, we used to dissect whole animals, and things like that."
Jacqui laughs when thinking how her grandmother asks "if you cut anything up these days".
Her studies are based around genetic approaches which, using DNA sequencing, are increasingly revealing new information about New Zealand's abundance of endemic species.
The masters degree she's now part-way through focuses on the Chatham Island taiko, one of the rarest seabirds in the world, with a population estimated at fewer than 150.
Dame Catherine, who was keenly awaiting Jacqui's graduation ceremony on Wednesday next week, felt it was more important than ever that researchers like her granddaughter better understood New Zealand's wealth of flora and fauna.
"If more people understood the natural biology we have, I think New Zealand would be a better place."