- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesH - History of science and other interests
- SubseriesH1-H108 - History of Science
- FileH71-H74 - Barbara Mary Middlehurst (1915-1995)
- ItemH71 - Correspondence from Middlehurst
- ItemH72 - Correspondence re Middlehurst and Jeffreys's obituary
- ItemH73 - Typescript; proof of Jeffreys's obituary of Middlehurst
- ItemH74 - Photocopied and manuscript biographical information on Middlehurst; typescript obituary of Middlehurst by Geoff Mules