| AdminHistory | According to a later manuscript note concerning the provenance of the diary, Mr Stevens may have been an engraver or designer, and his interests ranged across science, astronomy, mathematics, photography, and music. |
| CustodialHistory | Part of the library of Charles Kay Ogden (1889-1957), linguistic psychologist, founder of the Orthological Institute and originator of the language system Basic English, whose interests in language systems are reflected in the subject matter of his collection, which comprised individual manuscripts and manuscript collections dating from the 14th to the 20th century. |