Nuisance variable

Title: Nuisance variable
Author: leone
Rating: G
Character(s): Watson, Mrs. Hudson, Holmes in absentia
Summary: Experimental research does not always yield the desired results.
Warnings: None
Author's Notes: ACD-verse. Fill for July 30th prompt: "Is that  __(item name)__ supposed to be _(doing that)  ?"
Word Count: 583

( Dr. Watson lugged his valise wearily along Baker Street . . . )