Peter Henry Berthon to Faraday   6 October 1859

Trinity House, London, E.C., | 6th October, 1859.

Sir,

Referring to my personal communication with you on the subject of the proposed Visit of the Elder Brethren to Calais,- I am directed to acquaint you that it has been determined to accept the Invitation of the French Light House Authorities of which I apprized you, and to proceed to that place as invited, on the 14th Instant;- and I am to express the hope of the Elder Brethren that it will suit your convenience to accompany them on that occasion¹

In the mean time I am to forward, for your perusal and consideration, a copy of Notes upon Experiments, which have been made by the Light House Authorities in France, as to the application of moulded Lenses for the purposes of Light House Illumination.-

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

M. Faraday Esq., | &c &c &c | Royal Institution.

P.S. I shall be obliged by your returning me the enclosed Notes as soon as convenient. You shall have them again if you wish it.