Jacob Herbert to Faraday   11 December 1845

Trinity House | 11th December 1845.

My dear Sir,

I have much pleasure in sending you the accompanying Copy of a very satisfactory Report¹ respecting the operation of your ventilating Tubes at the High Light House at Haisbro'. I do not know what is meant by the remark upon the insufficient length of the Conducting pipes but it is vexatious that any imperfections in the details in carrying out your principle, and which have nothing whatever to do with it, should interfere with the perfect development of its advantages in practice.

I cannot permit this occasion to pass without returning you my best thanks for your explanatory letter of the 25th October², consequent upon the conversation I had with you touching the divergence of the Rays of Light from the Rape Oil Lamp, when used with the Parabolic Reflector. It is much too late to make this acknowledgement, but I know you will kindly pardon the apparent inattention. Be assured that it was read at the Board meeting after its receipt, and be assured also that the Deputy Master³ & Brethren were equally obliged with myself by your clear elucidation of the subject.

I remain, | My dear Sir | Your most faithful Servant | J. Herbert

M. Faraday Esq