The title page says this is one volume of a six-volume collection of 101 stories, published in 1907 and edited by Julian Hawthorne. From the author dates I'm guessing this is volume 1.
This collection contains 13 stories:
The Necklace (Guy de Maupassant)
The Miracle of Zobeide (Pierre Mille)
The Torture of Hope (Villiers de L'Isle Adam)
The Owl's Ear, The Invisible Eye, The Water of Death (Erckmann-Chatrain)
Melmoth Reconciled, The Conscript (Balzac)
Zadig the Babylonian (Voltaire)
The Nail (Perdo de Alarcon)
The Desposition (Luigi Capuana)
The Adventure of the Three Robbers (Lucius Apuleius)
Letter to Sura (Pliny the Younger)
The kindle edition hase no active table of contents, no navigation at all. It is 3790 "locations" long. The formatting of the text itself seems okay, italics where italics belong, but sometimes it's not always easy to tell when a story ends and commentary for the next begins.
The stories are mostly 18th- & 19th-century European. If you like that sort of stuff. They do not strike me as mystery stories I know. These seem story first, mystery second.