Who said "My dear Watson, you see, but you do not observe"?

This quote is attributed to Sherlock Holmes.

My dear Watson, you see, but you do not observe - Sherlock Holmes

"My dear Watson, you see, but you do not observe"

Sherlock Holmes Knowledge

Character in The Hound of the Baskervilles

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"The world is full of obvious things which nobody by any chance ever observes."

"The moor is a dangerous place, Watson."

"I cannot but think that you are justified in your caution."

"One should always look for a possible alternative."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."