He saw part of a ticket in her glove.
She gave him the ticket.
She told him.
He saw her get off the train.
Her father died.
Her mother died.
Her sister died.
Someone robber her.
He knows that his stepdaughter has just given Holmes money.
He thinks his stepdaughter has just visited Holmes.
He thinks that Holmes wants to take his money.
He thinks that Holmes wants to kill him.
Holmes wants to be a police officer, but he hasn't been accepted.
Holmes dresses like a police officer, but he isn't a real police officer.
Holmes used to be a police officer but quit a long time ago.
Holmes acts like a police officer but isn't a real one.
He doesn't love their husbands.
He doesn't want his daughters to leave home.
He has a different husband chosen for each of his daughters.
He will get less money every year if his daughters are married.
He needed a repairman to fix the problems in the room.
They needed to use the ventilator quickly before Dr. Roylott returned.
There were many strange things that made him suspicious.
There was no air in the room, and he needed to breathe.
She told him on the train.
She showed him a picture of the room.
He had seen a floor plan of the room.
She had told him that her sister had smelled cigarette smoke from inside the house.
A group of traveling gypsies
John told Sherlock that he had come from there.
Sherlock noticed mud on John's boots and knew it was from Sussex.
Sherlock noticed John's ticket in his left coat pocket.
John had a strange accent that sounded like the Sussex accent.
A little afraid, but mostly excited