A CRITICAL MOMENT IN THE DISCOVERY OF GENERAL RELATIVITY: AUTOGRAPH LETTER SIGNED TO LUDWIG HOPF FROM 1913 WHERE EINSTEIN’S ABANDONS THE REQUIREMENT OF GENERAL COVARIANCE. More

EINSTEIN RESPONDS TO A STUDENT, EXPLAINING A CENTRAL TENET OF RELATIVITY. More

HEISENBERG PROVIDES HIS RECOLLECTIONS OF THE ORIGINS OF NIELS BOHR’S CONCEPT OF “COMPLEMENTARITY”. A UNIQUE ITEM, OF UTMOST IMPORTANCE FOR THE LIGHT IT SHEDS ON THE PHILOSOPHICAL FOUNDATIONS OF QUANTUM MECHANICS AS SEEN BY THE PIONEERS IN THE FIELD. More

IMPORTANT SIGNED LETTER BY RONALD REAGAN. On the heels of the great success of his famous speech for Barry Goldwater, Reagan weighs a political career for himself. More

POIGNANT SIGNED LETTER FROM ROOSEVELT ON HIS RESOLVE NOT TO LET POLIO DEFEAT HIM. More

ROOSEVELT’S HISTORIC LETTER INVITING MAUD NATHAN TO LEAD THE SUFFRAGE COMMITTEE OF THE PROGRESSIVE PARTY. More

INSCRIBED FIRST EDITIONS IN A PRESENTATION BINDING WITH ORIGINAL WRAPPERS BOUND-IN. A SUPERB ASSOCIATION COPY, SIGNED AND INSCRIBED BY STIEGLITZ: “To my friend, advisor & co-worker / John Francis Strauss / from / Alfred Stieglitz.” Additionally noted by Stieglitz “Feb, 17 - 1905. Third Anniversary of the birth of the..... More

A REMARKABLE VOLUME OF THE FIRST EDTION OF THE DEFINITIVE COLLECTION OF WHITMAN’S WORK, SIGNED BY WHITMAN ON THE TITLE PAGE. 

 A PRESENTATION COPY SIGNED AND INSCRIBED BY WHITMAN TO GABRIEL SARRAZIN AND WITH A LONG REVEALING AUTOGRAPH LETTER DISCUSSING HIS HEALTH AND LEAVES OF GRASS. More

REVEALING LETTER BY YEATS ON HIS POETIC TASTES AND INFLUENCES. More