Errett McLeod Graham (1877-1974) was a civil engineer for various railroads. He was married to Helena "Lena" Washburn Graham (1881-1970) for nearly sixty-six years. Helena Graham was a homemaker to the couple's three children. The Grahams spent the early years of their marriage in remote railroad construction camps and small towns in Tennessee and West Virginia before settling in Rensselaer, Indiana. This item is a single-volume diary handwritten by both Errett and Lena Graham in 1910 while living in Tunnelton, West Virginia, were Errett was working for the Baltimore & Ohio Railway Company. The diary would be of interest to those researching women's studies, railroad history, and civil engineering.