Arthur Conan Doyle, A Scandal in Bohemia

By the way, Doctor, I shall want your cooperation.'
'I shall be delighted.'
'You don't mind breaking the law?'
'Not in the least.'
'Nor running a chance of arrest?'
'Not in a good cause.'
'Oh, the cause is excellent!'
'Then I am your man.'
'I was sure that I might rely on you.

Life Quotes And Sayings by Arthur Conan Doyle, A Scandal in Bohemia