Sir Arthur Conan Doyle quotes
You have a grand gift for silence, Watson. It makes you quite invaluable as a companion. 
Mediocrity knows nothing higher than itself; but talent instantly recognizes genius. 
What you do in this world is a matter of no consequence. The question is what can you make people believe you have done. 
Education never ends, Watson. It is a series of lessons, with the greatest for the last. 
It may be that you are not yourself luminous, but that you are a conductor of light. Some people without possessing genius have a remarkable power of stimulating it. 
When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth. 
There is nothing more deceptive than an obvious fact. 
It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. 
It has long been an axiom of mine that the little things are infinitely the most important. All Sir Arthur Conan Doyle quotes ⇑
There is no scent so pleasant to my nostrils as that faint, subtle reek which comes from an ancient book.
A dog reflects the family life. Whoever saw a frisky dog in a gloomy family, or a sad dog in a happy one? Snarling people have snarling dogs, dangerous people have dangerous ones.
I am a brain, Watson. The rest of me is a mere appendix.
Watson. Come at once if convenient. If inconvenient, come all the same.
My name is Sherlock Holmes. It is my business to know what other people do not know.
You see, but you do not observe.
It is a great thing to start life with a small number of really good books which are your very own.
'Is there any point to which you would wish to draw my attention?' 'To the curious incident of the dog in the night-time.' 'The dog did nothing in the night-time.' 'That was the curious incident,' remarked Sherlock Holmes.