Timelines in Emily Bronte's "Wuthering Heights"

The plot runs from 1771 to 1801 and is chronologically contradiction-free. Ellen's story is fair with some deliberate inaccuracies. Catherine becomes pregnant only after Mr. Heathcliff's return. Mr. Heathcliff's ancestors and descendants cannot be determined. He dies at 38 from a tetanic seizure caused by a supposed ghost, which is probably Cathy.