The huge, red brick building loomed over us. It seemed odd to think that, in this place, people's lives were changed for good when, in the surrounding factories, children lived out their miserable existences in starvation and poverty. Sherlock stepped up to the imposing wooden doors and knocked. Slowly they opened to reveal a man of about my age with a thick cockney accent. He seemed scared – almost as if there was something he was trying to hide.

"What is your business here?" he asked.

Before Holmes and I could say anything, Vastra answered his question causing the man to seem more at ease (he had no idea what terrible visage lay beneath her veil).

"We mean you know harm," she began "We only want to inspect the good work you are doing. I am sure that our findings will be positive."

She gave the man a nudge and, together, we entered the building.