The book:
 The City College: memories of sixty years
edited for the Associate Alumni of the College of the City of New York
by Philip J. Mosenthal and Charles F. Horne
New York,: G. P. Putnam, 1907

P.263

Tutor Tisdall [...our dear Professor Tisdall, who seemed to know so much that was profound and beyond our ken of Latin and Greek. p.248] wore a certain aura of renown because our unwritten chronicles had it that he could play several games of chess at once blindfold, and that he had met defeat with honor in the lists of Caïssa at the hands of the invincible Paul Morphy.