Ferdinand Joseph Fuller Crossman, son of Martin Luther and Experience Robbins Crossman, was born in 1834 and raised by his paternal grandfather in Sutton, Massachusetts. He enlisted at Cambridge in the First Company of Sharpshooters, known as the "Andrew Sharpshooters," which was attached to the 15th Massachusetts Infantry in August 1862. He didn't see action until the first battle at Fredericksburg in the winter of 1862. He was wounded at the second battle at Fredericksburg in the spring of 1863, when one of his fingers was shattered by a bullet. He narrowly escaped serious injury at Gettysburg, but his health quickly deteriorated from exhaustion and exposure; he was hospitalized, first at Harper's Ferry, and later at the Armory Hospital in Washington, D.C. He re-joined the army at the Battle of the Wilderness (May 3-7, 1864), and was captured at the Battle of Spotsylvania Court House. He died of disease on August 9, 1864, at the Andersonville, Georgia, prison.
Adelaide Isham Crossman was born to Franklin H. and Rebecca Isham on March 17, 1837, in Massachusetts. She lived in St. George, Vermont, and moved to Whitinsville, Massachusetts, in 1855, after marrying Ferdinand Crossman. After Ferdinand's death, Adelaide married Frederick Phineas Burr, another Union soldier, in 1866; they had one daughter, Ida R., in 1870.