Third letter from John David Griffith Davies, to Harold Spencer Jones, regarding a paper 'The Earth's magnetic field in Southern Africa at the epoch, 1 July 1930' by E N Grindley Sectional Committee: Not stated [Physics] The paper communicated in 1939 has now been passed for open publication. The lettering on the maps and figures would require many hours' work to complete, and that as many of the engravers called up have not yet been released, there will be a delay of several months before the figures can be engraved. Asks if any of the lettering could be done by the staff at the Royal Observatory, so as not to delay publication if possible. [Published in the Philosophical Transactions of the Royal Society] No received date. 9 July 1945