WILTON, Conn. – A letter handwritten and signed by Albert Einstein to President Herbert Hoover in 1929; a one-page letter penned and signed by future President George Washington in 1783; and a charming photograph of baseball legend Lou Gehrig posing with a young boy, signed, with Babe Ruth in the background, are just a few of the rare autographs, manuscripts, books and photos in University Archives’ online-only auction slated for June 30, starting at 10:30 am Eastern time. Absentee and Internet live bidding will be available through LiveAuctioneers.