Royal Navy Medical Officers' journals at
the National Archives.
"The journals include a variety of colourful tales of 18th and 19th century ship life, from drunken rum-related incidents, venereal disease, scurvy, shark bites and tarantulas, to lightning strikes, gun fights, mutiny, arrests and court martial - not to mention ship wrecks and even murder."
This is a great digital resource for medical information in the Royal Navy!