Peter Henry Berthon to Faraday   3 October 1857

Trinity House, London, | 3rd. October, 1857.

Sir,

The Board of Trade having requested the Corporation’s opinion of the accompanying Plan for sounding Fog Bells by means of an Electro Magnetic Machine,- I am directed to forward the same to you, and to request you will favor the Elder Brethren with your views thereon.-

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

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