Complex sentence: Mark goes to a pair of investigating police detectives, Inspector Roberts (Charles McCaughan), and meets Lincoln as he lets Roberts investigate the Waxworks, as Mark and Roberts leave the Museum, Mark recognizes Lincoln.
Split into simpler sentences: Mark goes to a pair of investigating police detectives, Inspector Roberts (Charles McCaughan), and meets Lincoln as he lets Roberts investigate the waxworks. As Mark and Roberts leave the Museum, Mark recognizes Lincoln.