born in Annapolis Royal, Nova Scotia, British provinces of America
family moves to New York
earliest known date on a Sneden watercolor, "Sneden’s Landing, opposite Dobb’s Ferry, Hudson River, N.Y."
informal job with 40th N.Y. (“Mozart”) Regiment as assistant quartermaster
arrives at “Camp Sackett” on Leesburg Turnpike in northern Virginia where 40th N.Y. is camped; joins as a private
transferred from the 40th N.Y. to act as topographical engineer on General Samuel P. Heintzelman’s staff at Fort Lyon, Virginia
with Heintzelman’s staff, boards steamship for Hampton, Virginia, beginning of Peninsula Campaign
participates in Peninsula campaign and Seven Days battles
with the Army of the Potomac at Harrison’s Landing
participates in Second Bull Run campaign
on Heinzelman’s staff headquartered at Arlington House
moves from Arlington House to 15th St and Pennsylvania Avenue when Heintzelman is appointed to command the defenses of Washington
tires of his work at headquarters in Washington; assigned as map maker on. staff of General D. B. Birney and then on staff of General William French, Third Corps, Army of the Potomac
leaves Washington, D.C., to rejoin Third Corps near Brandy Station, Va.
at Miller’s House, near Brandy Station, HQ of General French, Third Corps; when he learns the Mine Run campaign is about to begin, he mails his diaries and drawings home to New York
captured by John Singleton Mosby’s men at Brandy Station, Virginia
arrives on prison train in Richmond, Va. incarcerated in Crew & Pemberton prison, a converted tobacco warehouse
attempted escape from prison
put on prison train at Richmond and shipped south
arrives at Salisbury, North Carolina, prison camp
arrives at Andersonville, Georgia, prison camp
witnesses battle between inmates and raiders in Andersonville
witnesses execution of raiders in the stockade
leaves Andersonville for Savannah prison camp
signs parole at Camp Lawton, Georgia, prison camp to work for Surgeon Isaiah White C.S.A.
arrives in Savannah. Surgeon White gives him a pass and allows him to board at Pulaski Hotel
leaves Charleston on train for Florence, South Carolina, prison camp still on parole to Surgeon White
is exchanged and boards USS Varuna sailing for Annapolis, Maryland
Varuna arrives at Annapolis, Maryland
arrives home in New York
musters out of 40th N.Y. "Mozart" Regiment
begins years work for architect William B. Olmsted, 50 Wall St.
moves to Greenwich, Conn., later to Monsey, Rockland Co., N.Y.
Sneden applies for a pension
Century Magazine’s serial on Civil War (Nov. 1884 to Nov. 1887) includes one engraving based on a Sneden watercolor; book form of the series, Battles and Leaders of the Civil War, includes several dozens engravings based on Sneden watercolors.
enters N.Y. State Soldiers & Sailors Home, Bath, Steuben County, N.Y.
dies at Soldiers & Sailors Home, Bath, age 86; buried at national cemetery, Bath, N.Y. section J, row 11, grave 14.