Working papers, correspondence, computer printouts and paper relating to the sunspot cycle and solar magnetic cycle. Includes: Working papers "Culgoora - film of 13 March 1970", "Solar cycle of RGG", "Solar rotation - review", "Theory of differential rotation and field amplification", "On the size of magnetic elements", "Some properties of flux strands"; Correspondence between RGG and: Bernard Yallop, Royal Greenwich Observatory; Robert Howard, Mount Wilson and Las Campanas Observatories; Photographs of graphs of sunspot cycle prepared for publication; Photocopy of paper "Sunspot periods in the late Precambrian glacial climate and solar-planetary relations" by G.E. Williams

Working papers, draft paper on the solar and magnetic cycle, correspondence. Includes: Draft paper "The sunspot and solar magnetic cycles. II. The interaction of flux tubes with the convection zone"; Working papers:- "Meridional velocities - observations, calculations", "Approximate calculation of the loss of flux across the equator", "Motion of flux tubes through the convection zone", "Mass inversion and potential energy changes in a vertical triangular deformation", "The floating of flux ropes", "Notes on previous work on the floating and transport of flux tubes in the convection zone"; Correspondence between RGG and: H. Abt, Editor, Astrophysical Journal; G. Burbidge, Director, Kitt Peak National Observatory, 19 January 1982