A copy of a letter from M.H. Jeffery to J.F. Hosie, 5 July 1968, regarding the mirror figuring and tube contract, enclosing a copy of Jeffery's letter to J.D. Pope, 2 July 1968, concerning automatic focussing, end focussing, primary figuring, optical alignment tolerance, the primary mirror cell, access to the Cassegrain cage, hydrostatic bearings, Koban-type declination bearings and the tube contract. There are also letters to Jeffery from Redman, 6 July, and Pope, 11 July, regarding points in Pope's letter of 2 July; and a letter from Redman to J.D. Pope, 12 July, concerning alignment checks and the Itek focussing device, which he dislikes.