Sherlock leaned over John's shoulder reading the laptop screen as the doctor laboriously typed his newest blog entry.
"The Giant Rat of Sumatra? That's the title?" queried Sherlock in a condescending tone. "Actually, I must admit you're showing quite a bit of talent: you've managed to come up with a title that is both incorrect and misleading at the same time. Well done!"
"What's your problem, Sherlock? It's a perfectly good title. And correct. After all, the case involved a large rat …. Okay I'll grant you that it wasn't a 'giant', but 'The Large Rat from Sumatra' isn't really as catchy a title, don't you agree?"
"John, John, John. Must I continually point out your errors? First of all, the turning point of the case had nothing to do with a rat, and everything to do with the brother-in-law. Secondly, the rodent in question is a native of Australia, not Sumatra; you're just showing your ignorance with a mistake like that John."
"Sherlock," snapped the now highly-annoyed ex-Army Doctor, "I've only just started typing. Don't worry, I'll make sure you get your due!"
"Fame doesn't matter to me John, you know that," retorted the lanky detective as he swanned out of the sitting room. "Besides, you've still not corrected your biggest mistake. It wasn't a rat. It was a bandicoot!"
A/N: In one of the original Sherlock Holmes stories, ("The Sussex Vampire") Holmes says to Watson: "It was a ship which is associated with the giant rat of Sumatra, a story for which the world is not yet prepared".
For some reason the thought came to me "what if John mistakes a bandicoot for a rat" - a bandicoot is really just a large rodent - and while typing up his newest blog entry, Sherlock catches him on it. The above is the result.
As always, thanks to my beta sarajm for some excellent suggestions!