The Last of a Great Sultan

I bought recently a magazine article entitled 'The Last of a Great Sultan' written by Poultney Bigelow. The article was about Sultan Hashim which makes the article about 100 years old as Sultan Hashim died in 1906. The article was pulled out of Harper's Monthly Magazine. I was clueless about Harper's.Recently I did a quick check on the net and found that Wikipedia has an entry on it: "Harper's