The Early Casebook of Sherlock Holmes Books in Order

In 1876, young Sherlock Holmes investigates intruders at the British Museum before the Rosetta Stone is stolen. A ransom demand and threats to destroy the treasure send Holmes and medical student Stamford into a case that soon involves murder.

A boxer dies during a demonstration attended by Sherlock Holmes and medical student Stamford. When another fighter's body is found holding an ebony carving, Holmes investigates possible connections between the deaths and an earlier fatal encounter in the ring.

A preserved foot with extra toes arrives at a medical college, prompting Stamford to ask Sherlock Holmes to identify its owner. A concealed coded message and further deaths lead them toward the secretive Explorers Club, whose surviving members may also be in danger.