Including with Observatory magazine re publication of Ryle's Halley Lecture on 'Radio stars and their cosmological significance', and with J.H. Oort re Ryle's participation in the symposium 'Comparisons of the large-scale structure of the Galactic System with that of other stellar systems', 9th General Assembly of the IAU, Dublin, 1955 (see also H.210, H.211). 2 folders.