Peter Henry Berthon to Faraday   2 October 1862

Trinity House London. E.C. | 2nd October.1862

Sir,

Referring to the Interviews which you have had with the Deputy Master¹ in relation to the positions of the foci for a second order Dioptric Apparatus, I beg to acquaint you that a second order Lamp is now at this House and that the Elder Brethren will be glad to receive your report upon the foci at your earliest convenience.

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

Profr. Faraday. | &c &c &c