Who said "I find myself back in my old light-conducting moods."?

This quote is attributed to Sherlock Holmes.

I find myself back in my old light-conducting moods. - Sherlock Holmes

"I find myself back in my old light-conducting moods."

Sherlock Holmes Happiness

"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."

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."