It has happened again. As reported in this column recently, the Library of America honored the late Elizabeth Spencer on June 1 by adding to its series an 864-page volume of her work. This month it adds another North Carolina connected author to its series, the popular short story writer, O. Henry. The new volume, “O. Henry: 101 Stories,” is being published this week. O. Henry was the pen name for William Sidney Porter, who was born in Greensboro in 1862 and grew up there. Shortly after he earned a license as a pharmacist and worked in his uncle’s business, he moved west to work on a ranch in Texas. After a stint in prison for a crime that had to do with missing money, he made his way to New York City.