Papers concerning Prof. W. Johnson's lecture 'The centennial year of Herbert Walker Swift' and its subsequent publication, letters and papers concerning a patent, correspondence of Mrs Maisie Swift after her husband's death, Swift's notes on plasticity, work by Swift's students.

Letters from Sir Charles Parsons to his brother, mainly concerning the development and testing of marine steam turbines; letters to Sir Joseph Larmor concerning Cambridge University business and other subjects; other letters.