John Gilmore Rowe was called "Gilmore", and like his older brother, D. Watson Rowe, he fought in the Civil War; he was a First Lieutenant, Company K, 126th Regiment, Pennsylvania Volunteers. He was a scout and kept a diary for 1863, when he was 21. He saw action in Fredericksburg and Chancellorsville, where he was severely wounded. Gilmore never married, and he died young, at age 32, in 1874, and he is buried in the Rowe family plot (with an obelisk) in Cedar Hill Cemetery in Greencastle, Penn. His sister, Martha Rowe Fletcher, named a son born the following year after her brother.