Most of the individuals on this list are relatives of W. B. Schwartz:

His daughters: Mrs. Portia Davis and Roberta Schwartz

Some of his siblings: N. F. Schwartz, Henry A. Schwartz, Mrs. Sophia S. Spring, Mrs. Sevilla Sheneman

A brother-in-law: Samuel Yeagerlehner of Upland, California

A few lawyers: Horace Smith, G. Otto, H. J. Everett and Joseph Kealing (the U.S. Attorney who prosecuted W. B.’s case)

Source:

Letters Sent, William B. Schwartz, Prisoner no. 5476; Inmate Case Files, U. S. Penitentiary, Leavenworth, Kansas, 1895-1931, Record Group 129; National Archives at Kansas City, Missouri.