Help With Sherlock Holmes Story

[Gromit33]

Does anyone remember a Sherlock Holmes story about a woman married to a miserable man who was having an affair and planning to leave him. It turned out that the husband murdered her in a gas chamber type thing within their house. Did I imagine this one?
Thank you.

[Svejk]

There's a famous one where someone gases 4? people by putting crystals on a lamp(or something) Don't know as his wife was among them.

[scorpiojo]

https://books.google.co.uk/books?id=FOfpAgAAQBAJ&pg=PT205&lpg=PT205&dq=sherlock+holmes+story+wife+gassed+to+death&source=bl&ots=xtui20J0Hd&sig=X1H6xz2dQ6i_RwoqnR2XUDZHv3I&hl=en&sa=X&;ei=NVgEVfuLEIfSaOHmgNgM&;ved=0CCcQ6AEwAw#v=onepage&q=sherlock%20holmes%20story%20wife%20gassed%20to%20death&;f=false

[Gromit33]

The Retired Colourman. Awesome. Thank you.