"I have know idea who ran to my aid but someone rang emergency services, that man tried to stop my bleeding, and there were other complete strangers trying to help as well.
Ms Marshall was lifted from the rocks by the Fire Service and taken by ambulance to Auckland Hospital in serious condition.
She had suffered two brain haemorrhages and a basal skull fracture. She stayed in hospital for more than a week and spent another week at a brain injury rehabilitation centre.
"My family were all really concerned. My youngest daughter thought I was going to die. She asked my eldest daughter: 'is mummy going to be okay?'
"I've read a bit about the injuries I had... People often die.
"But I'm back home now and I'm hoping I'll be able to gradually get back to work."
Ms Marshall is going to meet the fireman who helped her next week but also wants to thank the members of the public who assisted.
"I was pretty grateful for the life I had prior to this, and I'm more grateful now. I want to thank that man, and everyone else who helped; I might not be here if it wasn't for you."
Portia described the man as tall and caucasian with brown hair. "The man and a few others stayed with us until the ambulance came," she said.
"[Mollie] was hysterical. I was pretty worried but there was lots of people trying to help."