Letter from Robert Bellamy Clifton, to George Gabriel Stokes, regarding a paper 'Researches in spectrum analysis in connection with the spectrum of the sun' by Joseph Norman Lockyer Apologises for having taken so long to compile a report, owing to lack of time and ill health. Subject: Physics and Chemistry, Astronomy [Published in the 'Proceedings of the Royal Society of London', 1878] 11 March 1878