Correspondence and memoranda of R. Woolley regarding matters of secrecy with regard to the staff of the Royal Greenwich Observatory and the leaking of information; a letter from Permagon Press Ltd to Dr Hunter informing him that Volume 1 of 'Vistas in Astronomy' is to be published in March 1955; drawings of the 26-inch refractor at Greenwich, 1950; drawing number EEM/YM/936B, 'Royal Greenwich Observatory Herstmonceux. Proposed E., L. & P. [electric light and power] Installations in Domes A, C, D, E & F. Equatorial Group', June 1955; a summary of the electrical requirement for Dome A and the telephones, with plans indicating the positions of all rooms of the R.G.O.; listings of weights; and letters and memoranda to R. Atkinson on balance weights.