First page of John Keats's manuscript of his poem "To Autumn", 1819. "Season of mists and mellow fruitfulness ..." pic.twitter.com/r3FZGU27w9

— Bibliophilia (@Libroantiguo) August 17, 2015

"I am not blind to the worth of the wonderful gift of Leaves of Grass..." Ralph Waldo Emerson to Walt Whitman, 1855. pic.twitter.com/QD1TqkNFe3

— Bibliophilia (@Libroantiguo) July 21, 2015

Thoreau's journal handwriting http://t.co/QIPznhDQ9y (via @ransomcenter) pic.twitter.com/jfQ9IUo6Fy

— Austin Kleon (@austinkleon) July 9, 2015

For Frida Kahlo's birthday, her passionate handwritten love letters to Diego Rivera http://t.co/fcJ7yr1wGV pic.twitter.com/A7VW8Y004X

— Maria Popova (@brainpicker) July 6, 2015

Behold Thomas Jefferson’s Handwritten Vanilla Ice Cream Recipe http://t.co/cDRQNfRSHw pic.twitter.com/Up4dhce50F

— Open Culture (@openculture) July 1, 2015