Map, locations affected by the detonating bolide by George James Symons A map of the south of England and the Midlands onto which a series of black dots have been drawn around Berkshire, Oxford, Hertford, Bedford and Cambridge to indicate 'whence returns have been received' regarding the shock caused by the bolide. Subject: Astronomy A print of this map was published in volume 43 of the Proceedings of the Royal Society alongside the paper 'On the detonating bolide of November 20th, 1887'. 1887