Leather bound volume with handwritten entries to page 223 and with some printed materials attached.

Diary details Cluff's study at the University of Michigan beginning December 14, 1886, and other events and reminiscences up until the eve of his departure on the South American Expedition in June, 1900. Entries begin again on November 1, 1903, continuing until December 23 and detailing his work at the Academy after his return from Columbia and before his resignation in 1903.