O. Henry 
The Gift of The Magi 

The magi, as you know, were wise men – wonderfully wise men – who brought gifts to the new-born King of the Jews in the manger. They invented the art of giving Christmas presents. Being wise, their gifts were no doubt wise ones, possibly bearing the privilege of exchange in case of duplication. And here I have lamely related to you the uneventful chronicle of two foolish children in a flat who most unwisely sacrificed for each other the greatest treasures of their house.