Letter from Richard Christopher Carrington, Observatory, Redhill to Edward Sabine Carrington thanks Sabine for the response to his application. Refers to Mr [Samuel Heinrich] Schwabe’s claims regarding his [30 year observations of the surface of the sun and his discovery of periodicity in the frequency of the solar spots]. Carrington believed there may be opposition to his endeavours to [challenge] Schwabe’s claims from Mr [George Biddell] Airy. 16 December 1856