Copy letter from Herbert Rix, to Eric S Bruce, 10 Observatory Avenue, Kensington, W. Rix is directed to thank Bruce on behalf of the Soirée Committee for his offer to exhibit a new class of lightning flash at the Royal Society Conversazione on 14 May and regrets that they are unable to accept for that date. In future they may have less of a press upon space and if so he will place Bruce's letter again before the Committee. 22 April 1890