Peter Henry Berthon to Faraday   25 March 1862

Trinity House, London, | E.C., | 25th March, 1862.

Sir,

I am directed to transmit, for any observations you may have to offer thereon, the enclosed Form of Tender and specification for a First Order Dioptric Lighting Apparatus¹.-

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

M. Faraday Esq. | &c &c &c