"I've found it! I've found it," he shouted to my companion, running towards us with a test-tube in his hand.

"I have found a re-agent which is precipitated by hoemoglobin, [4] and by nothing else." Had he discovered a gold mine, greater delight could not have shone upon his features.
"Dr.Watson, Mr.Sherlock Holmes," said Stamford, introducing us.
"How are you ?" he said cordially, gripping my hand with a strength for which I should hardly have given him credit.

"You have been in Afghanistan, I perceive." "How on earth did you know that ?" I asked in astonishment.
"Never mind," said he, chuckling to himself.

"The question now is about hoemoglobin.

No doubt you see the significance of this discovery of mine ?" "It is interesting, chemically, no doubt," I answered, "but practically----" "Why, man, it is the most practical medico-legal discovery for years.
Don't you see that it gives us an infallible test for blood stains.