Correspondence regarding Dilworth, Secord, Meagher and Associates (D.S.M.). There are copies of letters from George V. Meagher and John C. Farrell of D.S.M. to M.H. Jeffery, including a schedule for design drawings and costs estimates; and correspondence between Redman and Jeffery on the high costs of the D.S.M.'s involvement, including Jeffery's comments on the draft mirror specification and the interest shown by Tinsley Laboratories Inc. in bidding for the figuring and tube contract.