Thank you very much for commenting. I've been a Holmes fan for the last 47 years and I'm old enough to remember a few Victorians, some of the characters are based on people whom I knew - my grandmother for one, her house is mentioned in the fic and Jenny Prewett is based on her.
Writing Watson wasn't hard, which is a touch worrying. Am I really so like a middle-aged, middle-class English Victorian male??