What are Mr Pennington's lies in the book Death on the Nile?

In the book "Death on the Nile" by Agatha Christie, Mr. Pennington lies about his profession, claiming to be a partner in a firm in London when in reality he is an employee. He also lies about his relationship with his fiancée, only revealing his true feelings towards her towards the end of the story. Additionally, Mr. Pennington may be suspected of lying about his motives and actions during the investigation of the murder on the Nile.