Jack Croker
From The Arthur Conan Doyle Encyclopedia

Fictional character.
In the Sherlock Holmes stories
He was misspelled "Crocker" in the US Doubleday editions...
- Jack Croker was the first officer on the "Rock of Gibraltar" (ABBE 527), and was promoted captain of the "Bass Rock" (ABBE 415).
- He was a very tall young man, golden-moustached, blue-eyed, with a skin which had been burned by tropical suns, and a springy step which showed that the huge frame was as active as it was strong (ABBE 494). He was reliable on duty, but a wild, desperate fellow off the deck of his ship, hot-headed, excitable, but loyal, honest, and kind-hearted (ABBE 420).
- He met Mary Fraser (future Lady Brackenstall) on the "Rock of Gibraltar" and fell in love with her (ABBE 528).
- After Mary's marriage with Sir Eustace Brackenstall, Croker killed her abusive husband in a fair fight, and — hot-headed yet kind-hearted — helped stage a burglary to shield her (ABBE 559).
- Sherlock Holmes did not exposed or pursued him (ABBE 610).
