Arranged by series as follows:
- JA/6/1 - family correspondence
- JA/6/2 - correspondence on academic subjects
- JA/6/3 - miscellaneous personal correspondence
- JA/6/4 - journals, diaries, notebooks
- JA/6/5 - logic
- JA/6/6 - political economy, general
- JA/6/7 - banks and banking
- JA/6/8 - capital
- JA/6/9 - coal
- JA/6/10 - credit
- JA/6/11 - currency, money, bullion, etc.
- JA/6/12 - industrial development
- JA/6/13 - iron and steel trade and manufacture
- JA/6/14 - land
- JA/6/15 - property
- JA/6/16 - railways
- JA/6/17 - rent
- JA/6/18 - shipping and shipbuilding
- JA/6/19 - speculation
- JA/6/20 - stock exchanges
- JA/6/21 - solar influences on commerce ('sunspot theory')
- JA/6/22 - taxation
- JA/6/23 - trade and commerce
- JA/6/24 - trades and occupations in London
- JA/6/25 - wages
- JA/6/26 - wealth
- JA/6/27 - astronomy
- JA/6/28 - inventions and patents
- JA/6/29 - mathematics and statistics
- JA/6/30 - meteorology
- JA/6/31 - steam engines
- JA/6/32 - miscellaneous scientific subjects
- JA/6/33 - drink and temperance
- JA/6/34 - family budgetting
- JA/6/35 - government, government control
- JA/6/36 - human nature, human development, evolution
- JA/6/37 - industrial legislation
- JA/6/38 - infant mortality and welfare
- JA/6/39 - labour
- JA/6/40 - law
- JA/6/41 - libraries
- JA/6/42 - population
- JA/6/43 - statistics
- JA/6/44 - female employment in factories, male employment in general
- JA/6/45 - beauty
- JA/6/46 - Jeremy Bentham
- JA/6/47 - music
- JA/6/48 - miscellaneous unclassified notes and fragments
- JA/6/49 - academic & personal appointments
- JA/6/50 - criticism and discussion of Jevons' writings
- JA/6/51 - obituaries