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Why 221B Baker Street?

There are questions we rarely ask, simply because they seem too small to matter. Here's one: why did Arthur Conan Doyle choose 221B as the address of Sherlock Holmes and Dr. John H. Watson's Baker Street flat? It's not an important question. But it is a genuine mystery.

Every Sherlockian knows that 221B Baker Street didn't actually exist when Holmes and Watson supposedly rented their rooms there. Wikipedia notes that an 1890 map of London shows the highest street number on Baker Street at the time was 85. So why 221B?
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The standard answer is that Doyle invented the address on purpose, so no one could claim to live in the great detective's old rooms. I don't disagree — but that explanation only goes so far. It doesn't say why 221, specifically, and not 220 or 222. Was the number arbitrary? And why "B"? Why not "A," or no letter at all?
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As it turns out, there's a real answer — and you can hear it in Chapter 8 of Watson & Doyle, Part 1. Press play below to listen. If you like what you hear, the full audiobook is available for download — just click the DOWNLOAD button under the image of the cover.
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Available in Two Formats

Watson & Doyle Part 1 - Audiobook

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The Audiobook version is perfect for those who wish to listen to Watson & Doyle, Part 1. It comes as an '.mp3" file that is playable on all digital devices.

Watson & Doyle Part 1 - PDF Book

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The PDF version is perfect for those who wish to read Watson & Doyle, Part 1. It comes as an '.pdf" file that can be opened on all digital devices.

Excerpts from Watson & Doyle - Part 1

Why 221B Baker Street?

Have you ever wondered why Arthur Conan Doyle chose 221B as the Baker Street Address for Sherlock Holmes? Click to listen to Chapter 8:
Listen

Celebrating at Simpson's

Have you ever wondered what it's like to eat at the famous restaurant in London called Simpson's-in-the-Strand? Click to listen to Chapter 22:
Listen

Why Shorter Stories?

Why did Watson and Doyle choose to write shorter stories, instead of full length novels like A Study in Scarlet? Click to listen to Chapter 25:
Listen

Contact the sherlock holmes society

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sherlock Holmes Society of the cape fear

P. O. Box 347
​Carolina Beach, NC   28428
This site was last updated September 16, 2026 by Tom Campbell
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