They travelled to Fulham Broadway by tube, and when they changed onto the District line they had the whole carriage to themselves.
"Where are we going?" Sherlock asked as they pulled out of Edgware Road station.
"To speak to the woman that Sally Donovan met last night." John let the train pull out of another station before elucidating. "We think she passed her some information, but that's not the only reason we're interested in her."
"And why do I get the feeling you aren't going to tell me more?"
John laughed softly.
"Her description matches a person we've been looking for, and I want to talk to her."
Sherlock stared at his feet.
"Why did you do it?" He asked suddenly. "Why did you risk it, coming to get me?"
John stood as the train pulled into Fulham Broadway station, tapping his white stick against the platform as he stepped out. He waited until they were outside before answering.
"Barrymore wants your brother quite badly, and he is unlikely to believe that he disappeared without telling you."
"And?"
"And if killing you would bring your brother out of hiding, then that's what he was prepared to do."
The revelation momentarily silenced the younger man as they approached the house.
"We're here" Sherlock said as he reached up to ring the bell.