missed it. However, knowing that the question was floating around, I went
back and pulled out my copy of Stevenson's Treasure Island, and sure enough,
there was the answer:
The definitive answer (a la' Robert Louis Stevenson) is: 15
And again, I apologize if this is a day late and a dollar short, but I've
been missing postings lately, and do not know whether or not the
definitive answer was already given.