Ellie was travelling by train from Surrey to London on Wednesday to teach a fitness class when she fell ill.
When the 27-year-old came around she noticed a note left for her by a man called Tom.
The note read: "Hi Eleanor. I hope by the time you read this you are feeling better. You had a seizure on the train and I took you off.
"You didn't hit your head but I may have hurt your leg as I walked on it before realising you were on the floor having a fit! sorry!
"I'm also sorry I can't stay with you now but here is a coffee to perk you up later and £10 to make sure you get a taxi home.
"Sorry I don't have anymore money so I hope you don't live far away. I've contacted people from your phone and medical help is on its way and you're with train staff.
"Wishing you all the best and a quick recovery. Love Tom."
The part-time acupuncture student said the action Tom took had "restored her faith in humanity". She is now trying to locate him.
Ellie told the Evening Standard: "I have no idea who this man was or if he was sitting next to me but I wanted to show how grateful I am to him.
"If Tom does come forward, first of all I would like to give him back his money and then thank him for what he did. He deserves a lot of praise.
"It was so nice of him, it's one thing helping people but doing additional things like what Tom did is something else." Source: The Huffington Post UK.
Wikipedia says: Good Samaritan laws offer legal protection to people who give reasonable assistance to those who are, or who they believe to be, injured, ill, in peril, or otherwise incapacitated. The protection is intended to reduce bystanders' hesitation to assist, for fear of being sued or prosecuted for unintentional injury or wrongful death.
But what is a Good Samaritan? In the Bible, a man fell ill beside the road. Many men passed by without offering aid. Then, the man who had more to lose than the others stopped and did what he could to help.
Even now, Christians, Muslims, Jews, Catholics, Protestants, Hindus, Buddhists, African Americans, Native Americans, Hispanics, Asians, the poor, the homeless, the unattractive, gays, lesbians, the handicapped, the mentally ill, and countless other groups are still sometimes the victims of ridicule, hatred and discrimination.
What would you do if faced with a similar situation in which Tom found himself? Would you continue riding the train to your destination, or would you stop to help?