Who said "I had intended that you should see it in the plural."?

This quote is attributed to Sherlock Holmes.

I had intended that you should see it in the plural. - Sherlock Holmes

"I had intended that you should see it in the plural."

Sherlock Holmes Wisdom

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."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."