Warwick The Albert Wisner Public Library will present Hudson River Lighthouses with Kevin Woyce, a discussion and slide show, on Thursday, Aug. 11,at 6;30 p.m. Henry Hudson explored the river that now bears his name in 1609. The arrival of the steamboat 200 years later, and the opening of the Erie Canal in 1825, made the Hudson one of America’s busiest rivers. From 1826 until the middle of the 20th century, more than a dozen lighthouses guided ships past its islands and shallows. Woyce will discuss the reasons for the once 14 lighthouses on the Hudson and explain how seven were saved as historic landmarks. He will include in his remarks a description of the lives of the brave men and women who spent their lives tending the lights. The slide show includes his original photography of Hudson River lighthouses, bridges, scenery, and landmarks, plus vintage maps and images of historic people and places, including some of the Hudson’s “lost” lighthouses. This program is free and open to the public. Registration is required. To register online, visit www.albertwisnerlibrary.org or call the library at 986-1047, ext. 3.