scrutator
n. a person who investigates

ambagical
adj. obscure

butyraceous
adj. of the nature of, resembling, or containing butter

delibation
n. a slight knowledge of something

In “The Adventure of the Six Napoleons,” Sherlock Holmes makes an enigmatic allusion: “You will remember, Watson, how the dreadful business of the Abernetty family was first brought to my notice by the depth which the parsley had sunk into the butter upon a hot day.”

He says nothing more. In The New Annotated Sherlock Holmes, Leslie Klinger writes, “Numerous pastiches and analyses of the ‘Abernetty business’ have been written and are surveyed in detail in William Hyder’s ‘Parsley and Butter: The Abernetty Business.’ Hyder concludes, without foundation, that no less than murder was involved. Is it not equally likely that a business — perhaps an inn or tavern — run by the Abernetty family was ‘dreadful’ (that is, kept in poor sanitation), and that that condition was first brought to Holmes’ notice by the butter having been left out on a hot day? The connection between this observation and the ensuing investigation remains undetermined. A number of scholars consider whether and how fast parsley will sink into butter. Not surprisingly, they do not agree.”