Third letter to Eric Keightley Rideal, regarding a paper 'On the catalytic cyclization of aliphatic hydrocarbons. II' by E F G Herington and Eric Keightley Rideal Sectional Committee: Chemistry Encloses two proofs and slip proof of the paper from Proceedings C. Notes that 30 copies are required for the Fuel Research Board, and thinks an additional 20 copies will cover those who received copies of Part I. Asks for the return of the marked page proofs, no need to return the spare proof or slip, so long as they are treated as confidential documents. [Published in the 'Proceedings of the Royal Society of London'] No received date. 5 July 1944