A circular letter from Redman inviting comments on the design of the 150-inch telescope from prospective users, with replies from D.W. Dewhirst and R.V. Willstrop, University of Cambridge Observatory; H.A. Brück, Royal Observatory, Edinburgh; V.C. Reddish, Royal Observatory, Edinburgh; S.C.B. Gascoigne; D.E. Blackwell, Oxford University Observatory; R.H. Stoy, Royal Observatory, Cape of Good Hope; A.D. Thackeray, Radcliffe Observatory; D.W.N. Stibbs, St Andrews University Observatory, enclosing notes on peripheral equipment by I.G. van Breda and P.W. Hill; and C.W. Allen, University of London Observatory. The papers include Redman's comments on V.C. Reddish's letters and a handwritten chart showing astronomers' views of various aspects of the design.