Elementary?

But how do you know Holmes?
The man in front is not a photographer!
But how do you...?
He’s a Grandad. Our Grandad!
And the man behind us?
He’s a tailor!
But how do you know!
He just told us he is!
But how can you trust him. He just told us it’s 1890 .
Believe it , it’s to your advantage and this is Tyntesfield and this is the Christmas Festival!
Grandson 3&4 humouring me at the home of Mr Gibbs the guano multi millionaire! No honest it’s true!