Faraday to Christian Gottfried Ehrenberg   20 October 1842¹

Royal Institution, London | 20 Octr. 1842

Sir

For the honor which the Royal Society of Berlin has conferred upon me of being one of its Associates I beg leave most gratefully to return my thanks. I refrain from saying more upon paper in hopes that my friend Mitscherlich by whom I have received the Diploma² will in lively words better convey the sense of my deep obligation[.]

I am with the greatest respect | Sir | Your Very Obedient Humble Servant | M. Faraday

The Secretary of the | Royal Society of Berlin | &c &c &c &c