Jacob Herbert to Faraday   9 December 1847

Trinity House London | 9th December 1847.

Sir,

Mr. Alexander Gordon¹ Civil Engineer having introduced to the notice of this Corporation a Catadioptric arrangement for Fixed, Revolving, or Flashing Lights; - I am directed to acquaint you therewith, and to request that you will examine the same at this House and favor the Board with your Opinion thereof, with reference to its practical applicability to the purposes of Light House Illumination, and to the advantages, if any, which it may possess over the modes of such illumination now in use.

Possibly it may suit your convenience to be here for that purpose on Tuesday next at Two o'Clock².

I am | Sir | Your most humble Servant | J. Herbert

M. Faraday Esq.