Peter Henry Berthon to Faraday   30 January 1857

Trinity House, London, E.C. | 30th. January, 1857

Sir,

I am directed to transmit you, the accompanying sample of Red Lead which Messrs. Pilcher propose to provide for the service of this Corporation, and as it is important that the best red Lead should be supplied, I am directed to request you will subject it to such analysis as shall determine the genuineness of the article.

I am, | Sir, | Your most humble servant | P.H. Berthon

Professor Faraday