Sherlock and Joan-2x21

Sherlock saw at least 3 different exits from where he stood but all were to far to hatch an escape attempt that wouldn't involve a casuality. He knew what is was like to be shot but didn't want to experience it again. He checked his watch it was ten to eight, he needed to send a signal to Gregson but how? He looked round him for something that could help, he noticed a button the right hand side of the bacheca which could be the buildings old whistle to alert the men work was finished. But getting to it would prove to be a challenge.

'Which one of te is lying?'
'Micheal we've been doing buisness...

'What are te doing here?'
'Can't a guy drop da and say hello?'
Sherlock stepped outside, shutting the door behind him.
'When the guy happens to be a current drug addict, no he can't.'
'You're one to talk.'
'I've been clean for almost 3 years.'
'Well congrats to you(!)' Oscar looked up at the brownstone. 'Nice place, daddy buy it for you?'
'He did.'
'You on your own?' Sherlock held up his left hand. 'Your married?'
'Almost two years.'
'Does she know about your past? Irene? The drugs?'
'She knows it all. Now, what do te want?'
'I was hoping for a fix.'
'Not likely, now if te excuse me.' Sherlock went...