September 11, 2012, Filed Under: Books + ManuscriptsO. Henry turns 150 today To celebrate the 150th birthday anniversary of American writer William Sidney Porter—better known by his pen name of O. Henry—Cultural Compass has compiled a gallery of images from the O. Henry manuscript collection. The Ransom Center holds two boxes of materials that include letters and manuscripts. Please click the thumbnails below to view full-size images. O. Henry’s illustrated comic verses for his daughter, Margaret, not dated. O. Henry’s illustrated comic verses for his daughter, Margaret, not dated. O. Henry’s illustrated comic verses for his daughter, Margaret, not dated. O. Henry’s illustrated comic verses for his daughter, Margaret, not dated.