O. Henry's stories are never quite what you might expect and "The Last Leaf" is not an exeption.
Also you can watch an adaptation of O. Henry's "The Last Leaf" on my blog.
Have a good time!
"It was during these New Orleans days that I adopted my pen name of O. Henry. I said to a friend: "I'm going to send out some stuff. I don't know if it amounts to much, so I want to get a literary alias. Help me pick out a good one." He suggested that we get a newspaper and pick a name from the first list of notables that we found in it. In the society columns we found the account of a fashionable ball. "Here we have our notables," said he. We looked down the list and my eye lighted on the name Henry, "That'll do for a last name," said I. "Now for a first name. I want something short. None of your three-syllable names for me." "Why don’t you use a plain initial letter, then?" asked my friend. "Good," said I, "O is about the easiest letter written, and O it is."