Around this time, parents are often prepping their children to head back to the classroom. But for RR Auction, September means a month of great events and exceptional items. The Fine Autographs and Artifacts auction and Remarkable Rarities event will feature three items from those famous figures found in your class textbooks – an early Helen Keller autograph letter, a Samuel L. Clemens cabinet photo and first edition book, and a letter on mathematics written by Albert Einstein.