Life, my dear Watson, is infinitely stranger than fiction; stranger than anything which the mind of man could invent. We could not conceive the things that are merely commonplace to existence. If we could hover over this great city, remove the roofs, and peep in at the things going on, it would make all fiction, with its conventionalities and foreseen conclusions flat, stale and unprofitable.

When we think how narrow and devious this path of nature is, how dimly we can trace it, for all our lamps of science, and how from the darkness which girds it round great and terrible possibilities loom ever shadowly upwards, it is a bold and a confident man who will put a limit to the strange by-oaths into which the human spirit may wander.

Perhaps, when a man has special knowledge and special powers like my own, it rather encourages him to seek a complex explanation when a simpler one is at hand.

All right, Watson. Don’t look so scared,” he muttered in a very weak voice. “It’s not as bad as it seems.” “Thank God for that!” “I’m a bit of a single-stick expert, as you know. I took most of them on my guard. It was the second man that was too much for me.” “What can I do, Holmes? Of course, it was that damned fellow who set them on. I’ll go and thrash the hide off him if you give the word.” “Good old Watson!(...)

No man lives or has ever lived who has brought the same amount of study and of natural talent to the detection of crime which I have done.

I am not a very good man, Effie, but I think that I am a better one than you have given me credit for being.

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.

What one man can invent, another can discover.

The man might have died in a fit; but then the jewels are missing," mused the Inspector, "Ha! I have a theory. These flashes come upon me at times... What do you think of this, Holmes? Sholto was, on his own confession, with his brother last night. The brother died in a fit, on which Sholto walked off the treasure! How's that?" "On which the dead man very considerately got up and locked the door on the inside," said Holmes.