Core blimey, mate! It’s British Mystery Multipacks Volume 11, a crackling cornucopia of classic cozy mysteries from across the pond:

The Murders in the Rue Morgue by Edgar Allan Poe, and its sequel The Mystery of Marie Roget

Edgar Allan Poe invented the detective genre with these twin tales featuring Parisian criminologist C. Auguste Dupin. In The Murders in the Rue Morgue the French supersleuth investigates the savage murder of a mother and daughter. In the sequel, The Mystery of Marie Roget, Dupin is on the hunt of a killer in a case based on the true story of Mary Rogers, a saleswoman at a cigar store in Manhattan whose body was found floating in the Hudson River in 1841.

The Lawyer's Story of A Stolen Letter by Wilkie Collins

An early detective mystery, probably influenced by Poe's Dupin tales. The narrator is a lawyer who contrives, in a series of ingenious moves, to steal back an incriminating letter from a blackmailer.  

Fountainblue and No Man’s Land by John Buchan 

Fountainblue is the story of a rich man who returns to Scotland believing he has everything he needs in life - until he encounters Clara Etheridge. But he must compete with a local man for her love. A  misadventure at sea forces the situation to a crisis. No Man’s Land is an occult mystery about an ancient culture in the Pictish land of Scotland.

The Clue by Carolyn Wells  

A Fleming Stone mystery from the golden age of detective fiction. The Clue falls squarely in the tradition of two favorite mystery sub-genres – the Big House Mystery and the Locked Room Mystery.

The Dream Doctor by Arthur B. Reeve

Craig Kennedy is a scientist detective at Columbia University similar to Sherlock Holmes and Dr. Thorndyke. He uses his knowledge of chemistry and James Bond-like gadgets in his work such as lie detectors, gyroscopes, and portable seismographs.