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Rh series represents an equivalent to the work of one man for ten years. (Literary Industries, 305). Indeed, Mr. Bancroft's own reason for entrusting this work to others is that it would have taken him a half century, leaving his main work untouched. Mr. Oak's indexing system proved a great labor saver, as by it the indexers went through all the material, classifying and making references. They were followed immediately by note-takers, who copied the facts indicated in these references. The writers then had the data placed before them for arrangement. When Mr. Bancroft's chapter on the Hyperboreans was completed he went over it with them, all making criticisms and suggestions to be adopted in the arrangement of the other divisions as well as that one. By this means was the library system perfected, a common method developed, and a corps of library workers trained: (Lit. Ind., 304).

The Native Races was very much in the nature of a compilation, and our knowledge concerning the authorship of its various parts is necessarily less exact than is true of any of the other Bancroft works. Such facts as are at hand come from two schedules—one of his own works, the other of that of the corps generally—prepared by William Nemos, a gifted Swedish writer who entered the library in 1873, subsequently becoming Oak's chief assistant, and ultimately his successor in the librarian's office; from separate information gained by Frances Fuller Victor as to the part of the work done by Oak. (This consists of three different statements, one in a letter to a friend, another in an autobiographical sketch, and a third in a statement copied by Mrs. Victor. Mr. Oak himself refuses to give testimony, doubtless on account of his former intimate personal connection with Mr. Bancroft and his acquiescence in the plan followed, as well as his poor health, which renders him unwilling