Who said "I have my methods, which are known to be infallible."?

This quote is attributed to Sherlock Holmes.

I have my methods, which are known to be infallible. - Sherlock Holmes

"I have my methods, which are known to be infallible."

Sherlock Holmes Success

"The game is afoot!"

"Elementary, my dear Watson."

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."

"I am not a romantic, but I am a realist."

"Success comes to those who never give up."

"Success is measured by happiness, not money."

"You make your own luck in this world."

"You have to be organized to be successful in anything."