Ellen Lewis (Herndon) Arthur was Betty Herndon Maury's cousin. Ellen's father (William Lewis Herndon) and Betty's mother (Ann Hull (Herndon) Maury) were brother and sister. Ellen married Chester Alan Arthur in 1859. Chester Alan Arthur became 21st President of the United States in 1881 following the death of President James Garfield. In 1882, President Arthur appointed Betty's husband, William Arden Maury, Assistant Attorney General.
Ellen Herndon Arthur
Chester Alan Arthur in 1859