Correspondence with G.E. Manville, Sir Howard Grubb, Parsons and Co. Ltd; M.H. Jeffery; and S.C.B. Gascoigne regarding Jeffery's visit to Britain; arrangements for meetings; Redman's visit to Sir Howard Grubb, Parsons and Co. Ltd to discuss mirror blanks and tests, including his report of the visit; and Redman and Gascoigne's proposed visit to Owens-Illinois Inc. There is a copy of a letter from D.S. Brown, Sir Howard Grubb, Parsons and Co. Ltd, to R.R. Heraty, 5 June 1969, enclosing a sketch of the method used in making strain tests; copies of correspondence between M.H. Jeffery and C.M. Topping, Sir Howard Grubb, Parsons and Co. Ltd, on the contract for mirror figuring and the specification for the supply of dummy mirrors; and a copy of a letter from Jeffery to G.E. Manville, 31 July 1969, confirming modifications to the contract discussions with J.D. Pope.