Jack or Trevor

Edith Presbury twice refers to her financée Trevor Bennett as 'Jack'.

Fort Dodge or Fort Smith

Fort Dodge is actually on the De Moines River in Iowa.
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Fort Smith is on the Arkansas River in Arkansas.
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The Crown Diamond

Whilst the adventure of The Mazarin Stone is generally considered to be one of the weakest entries in the Holmes canon, what is less recognised is that the story exists in another form, a short one-act drama called The Crown Diamond.

The play was first performed on the stage of the Bristol Hippodrome in 1921 with Dennis Neilson-Terry as Sherlock Holmes. What remains unclear is which version was written first. Most commentators point to the play as being the originator of the story because this explains the lack of a personal narrative by Watson. Is this conclusive evidence?....

The Crown Diamond: An Evening With Mr Sherlock Holmes (1921)
"The Crown Diamond" is an alternate version of the short story ‘‘The Adventure of the Mazarin Stone’’ though it predates its counterpart by some months. The short story was adapted from the play, this is the reason that the narrative is told in third person rather than by the traditional narrator Watson.
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Strand Publication

When first published in the Strand Magazine this story was entitled 'A Reminiscence of Mr Sherlock Holmes. 1.- The Singular Experience of Mr John Scott Eccles' and '2.- The Tiger of San Pedro.' The title 'The Adventure of Wisteria Lodge' came into being when the story was printed in book form.