Copy letter from Alfred H White, to Professor George Downing Liveing, Fellow of the Royal Society 'Dear Sir, I forward you proof (just received from engraver) for Drawing of the Spectrum figure to your Proceedings ['Proceedings of the Royal Society'] paper on Absorption Spectra of Oxygen. I do not think you have yet seen any proof of this figure altho' [although] the paper has been a month or two in hand & the Text passed by you. Will you please return both enclosures on the earliest possible day. Yours obediently A H White'. 13 August 1889