The opening up of the immensely fertile archeological field of northeastern Arizona is due to the initiative of Prof. Byron Cum mings, whose first expedition into the district was made in 1908. Since then he has done a great amount of thorough and painstaking work in the ruins. The Peabody Museum, feeling that the field was essentially his, asked his permission before undertaking their explorations. This was most cordially given. The authors wish, accordingly, to express their most hearty thanks to Professor Cum mings for his generous cooperation. The liberality of the following friends of the Museum provided a substantial addition to the somewhat scanty funds available for the work: Miss Madeleine Mixter and Messrs. 'augustus Hemenway, John E. Thayer, Bayard Thayer, William North Duane, Lawrence Grinnell, Bronson M. Cutting, Charles P. Bowditch, Clarence B. Moo-re, and J. M. Longyear.