On Nov. 14th, the Historical Society of Islip Hamlet will host author Bill Bleyer as he discusses his book, "The Sinking of the Steamboat Lexington on Long Island Sound".   The most luxurious steamboat caught fire in Jan. 1840; only 4 among the almost 150 on board survived.  The wreck was rediscovered by a team of divers in 1983.  The program will detail the story of the steamboat from its construction to its demise and will be held at the Islip Public Library, 71 Monell Ave., 7-9 pm, free and open to the public.  For more info: www.isliphamlethistory.org, 631-559-2915.