Personal and business correspondence

Includes correspondence on First World War summons for failing to keep windows shaded; consultancy work on problems with grinding lenses; correspondence with bank; sound reproduction; Lanchester's Laboratories Limited; business work; publications; and personal family correspondence. Some of the family correspondence was sent by Frederick Lanchester from the Isle of Wight to his wife Dorothea. Lanchester's brother Frank and family frequently stayed at Bembridge on the Isle of Wight, which Frederick Lanchester visited regularly to sail (often attending the Cowes sailing regatta).