Did Arthur Conan Doyle say “Elementary, my dear Watson”?

Did Arthur Conan Doyle say “Elementary, my dear Watson”?

Found word for word. The words exist, but not where people usually place them. The earliest match in our corpus comes from another source, listed below.

"No light repartee, have you, old bean? There, there, we can't always have brains as well as beauty. What have we for lunch? Stew? How did I know? Elementary, my dear Watson--the smell of onions is unmistakable."
The Secret Adversary — Agatha Christie, CHAPTER XVII. ANNETTE · ¶1904 · Public domain (US), Project Gutenberg #1155 · source

"No, I told Mart. I want the best physicist in this entire solar system--and since there are only one hundred and twenty-five planets around these seventeen suns, it should be simple to yon phenomenal brain. In fact, I expect to hear him say 'elementary, my dear Watson, elementary'!"
Skylark Three — Edward Elmer Smith, CHAPTER VI · ¶562 · Public domain (US), Project Gutenberg #21051 · source

"Elementary, my dear Watson, elementary," murmured Psmith.
Psmith, Journalist — P. G. Wodehouse, CHAPTER XIX · ¶959 · Public domain (US), Project Gutenberg #2607 · source

record sha256: e92f4eee8a56f18c9b5465ce9b98fd1c3d76feef38c9fb9d2343754379654007

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