Courtesy of the Chicago Public Library Tumblr
, we have the library card signed by Elvis Presley in 1948, when the rock icon was only 13 years old. Because it's believed to be the earliest known signature of the King, the autograph fetched $7,500 at auction last summer
, more than twice the original asking price. As for what was young Elvis reading, you're wondering? It's The Courageous Heart: A Life of Andrew Jackson for Young Readers
. h/t @kirstinbutler
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