Peter Henry Berthon to Faraday   13 October 1862

Trinity House, London. E.C. | 13th October.1862.

Sir,

Adverting to the Interviews you have had with the Elder Brethren, and with Messrs. Chance in relation to the mode of coloring the Light at the Hanois Light House, I am directed to request you will inform the Corporation whether you concur with Messrs. Chance in considering that it had better be done by means of a Red Cylinder, and if so, of the source whence the Red Color should be derived.

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

Profr. Faraday | &c &c &c