The clerk understood her to ask for a return ticket, but as she picked it up with the change for the five pound note with which she paid for it, she said that she thought she had asked for a single ticket.

He assured her that she had not, but offered to change it.

At that moment the departure of the train was signalled, and she ran through the barrier without waiting to change the ticket.

The incident caused him to observe her, and his description tallied so completely with Mrs.Pendleton's description that Barrant had not the least doubt that it was Sisily.
On the strength of this information Barrant applied to a local magistrate for a warrant for the girl's arrest.

He was well aware that he had not yet gathered sufficient evidence to satisfy the law that she had murdered her father, but his action was justified by her flight and the presumption of her secret visit to her father's house when she was supposed to be in bed and asleep at the hotel.
These things fulfilled, Barrant then applied his mind to the question of Thalassa's complicity.