Peter Henry Berthon to Faraday   4 October 1859

Trinity House, London, | E.C., | 4th October 1859.

Sir,

I am directed to transmit to you the enclosed Copy of a Letter addressed by this Board to Messrs Chance, Brothers, & Co. of Birmingham, relative to the modifications proposed by them, suitable to a Second Order Revolving Light with half-minute intervals consisting of 8 Holophotal Lenses, and their reply thereto, together with the accompanying drawing,- and to request that you will favor the Elder Brethren with your opinion thereon¹.-

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

Professor Faraday | &c &c &c