As ever, 3.5. The majority of the stories were quite interesting but some of them were certainly not mysteries by my reckoning. I'm going to have to review them story by story. I beg your indulgence.
The Story of the Young Robber - Washington Irving. A bit melodramatic, not at all a mystery
The Rifle - William Leggett - enjoyable, some pretty simple detectoring and sleuthing. A mystery!
Mr. Higginbotham's Catastrophe - Nathaniel Hawthorne. Hilarious! I need to read more Hawthorne. A mystery!
Murders in the Rue Morgue & The Purloined Letter - Edgar Allan Poe - the entire collection is pretty much framed around these stories as they are considered the earliest detective and mystery stories (they predate Conan Doyle and The Woman in White by a few decades I believe). While I love Poe, he is rather fond of unnecessarily archaic and lengthy words--which is why he's a great favorite of H.P. Lovecraft and writers of that sort. Still, very clever stories. I decided to just re-read the Purloined Letter as I read all of Poe's works a year or so earlier.
Remarkable Case of Arrest for Murder - Abraham Lincoln - mostly included for its novelty, it's an interesting legal mystery based on a case Lincoln was aware of in his days as an attorney in Illinois.
The Fatal Secret - Daniel Webster - very flowery prose mercifully short. Not a mystery, more of a parable or something?
The Danseuse - Thomas Bailey Aldrich - I loved this story! So unusual, such a compelling narrator and good surprise ending. A mystery, and I should like to read more of this man's work.
A Double Tragedy: an actor's story - Louisa May Alcott - embarrassingly, I have never read Little Women, so I can say that I've finally read something by Louisa May Alcott. Some melodrama, but enjoyable. Not a super surprising mystery, but still a mystery in format.
The Two Sister; or the Avenger - Allan Pinkerton - Allan Pinkerton would like to humbly assert before the unsuspecting reader how freakin' awesome he is at length. Not a mystery, and not particularly good, though I was interested to learn more about Allan Pinkerton and the Pinkertons.
The Lady or the Tiger? & The Discourager of Hesitancy - Frank Stocton - not really mysteries so much as "riddle stories" as the editor terms them. But great clever stories for all that.
A Thumb-Print and What Came of It - Mark Twain - I had forgotten what this story was about. But scanning through it again, it's quite a good read. Reminds me of Poe with more restraint. More thriller or horror story than mystery, it still has some mystery plotting.
My Favorite Murder - Ambrose Bierce - not a mystery at all but a morbidly comical and bizarre story.
The Sheriff's Children - Charles W. Chesnutt - I think Chesnutt is the only African-American writer in this collection, which is notable, and the fact that he got published in the 19th century while talking about race and miscegenation is impressive. The story itself is okay, sort of a mystery.
Gallegher: A newspaper story - Richard Harding Davis - a good read. The characters are interesting and well-conceived if not very deep. Gallagher is a great protagonist. A good mystery and partly a detective story.
'Round the Opium Lamp - William Norr - Hoo boy. The racism in this story and a much later one by Jack London are pretty difficult to take. More of a PSA on the dangers of opium, there's still a little bit of a reveal in the story.
Lingo Dan - Percival Pollard - More of a crime story than a mystery if I remember correctly.
I will have to come back to this at a later time with more of the stories.