Dr. John Watson: You remember your revolver?
Sherlock Holmes: Oh, knew I forgot something. Thought I left the stove on.
Dr. John Watson: You did.
Me: LEFT THE STOVE ON? Are you KIDDING me? This thing is set in 1890.
The Wife: Just let it go, honey.
Me: There were no electric stoves in 1890!!!The Wife: Maybe he left a wood stove on.
Me: How do you leave a WOOD stove on?
Someone at IMDB have tracked down a bunch of other anachronisms and recorded them here, but I've not seen anyone bothered by the stove thing yet. Doesn't matter. After four minutes I was done. From the few glimpses I got passing through the living room for the rest of the night, it doesn't look like I missed much.