GEN. JAMES H. LEDLIE. Gen. James H. Ledlie died yesterday, at St. Mark's Hotel, New-Brighton, Staten Island, of dropsy and jaundice, after a brief illness. He was about 50 years old and a native of Utica. He was graduated from the Scientific Department of Union College, and soon after was made a Division En- gineer on the Erie Canal. At a later period he took the contract of the Seneca River Improvement Company for draining the marshes near Geneva, in this State. At the beginning of the civil war he joined the Army of the Potomac as Major of the Nineteenth New-York Volunteers. Subsequently he was made a Colonel, and at the battle of Fredericksburg he commanded a brigade. After the battle he was promoted to Brigadier-General of Volunteers. During the greater part of 1863 he was Chief of Ordnance at Norfolk, Va., and he commanded the military in this City at the outbreak of the riots of 1863, but was superseded by Gen. Butler. After the war he returned to the practice of his profession, and was the first person to demonstrate the practicability of taking rafts from the lumber regions across Lake Michigan to Chicago. Later he obtained and carried out the contract for the construction of bridges, trestles, and snow-sheds along the entire line of the Union Pacific Railway. After completing that work he built the breakwater in Chicago Har- bor and did some railroad engineering work in Georgia. He next visited Europe, and after his return, in 1879, he built the Nevada Central Railroad, from Austin to Battle Mountain. He was when he died President of the Baltimore, Cincinnati and Western Railroad Construction Company, and First Vice-President of the railroad company; also Chief Engineer and General Manager of the Santa Rosa and Sonoma Central Railroad of California, Chief Engineer of the Nevada Southern Railroad, and largely inter- ested in the Indian River Railroad of Florida. He was a member of the Military Order Loyal Legion and a Mason of exalted degree. He leaves a widow and two sons. His body will be taken to Utica by the train which leaves this City at 10:30 o'clock this morning, and will be buried there to- morrow.