"Abraham Lincoln, Volume I" by John T. Morse Jr. is a biography published in 1893. This first volume of a two-volume work examines Lincoln's life with analytical rigor rather than hero worship. Critics praised Morse's clear-minded approach, though noted his focus on scientific criticism over appreciation. Morse was the first biographer to fully explore the puzzle of Lincoln's transformation from unremarkable politician to great president, describing him as "physically one creature, morally and mentally two beings." (This is an automatically generated summary.)