ALEXANDER MACKENZIE - (1844-dead) - Army Engineer, born Potosi, Grant County, Wisconsin. Graduated at West Point 1864. Brevetted Captain in Civil War for services. Then made surveys of Mississippi River, Lake Michigan, and other similar duties. Appointed Brigadier-General, Chief of Engineers (1904-1905). Retired as Major-General in 1908. Inaugurated "continuing contracts" in public improvements and other modern economical methods.