Complex sentence: During this final period of construction the light house became something of a tourist attraction though also on a more sober note near to the end of the project a worker, Charles Henderson, was lost during a storm, his body never found.
Split into simpler sentences: During this final period of construction the lighthouse became something of a tourist attraction. On a more sober note, worker Charles Henderson was lost during a storm near the end of the project, and his body was never found.